December 1, 2025

A decade on – life is different, but the drive & focus on winning in Chile are the same for Kurzbuch

2025 marks a decade since Simon Kurzbuch became the Champion of the World.  A driver Red RC have had the pleasure of following on his journey up through the ranks and into 1:8 Onroad racing history books, we first got to know him through the early days of the Euro Nitro Series and as one half of the talented Swiss racing duo that was himself and Silvio Hachler.  Unfortunately we would miss him claiming the biggest prize the sport has to offer, Brazil in 2015 the only 1:8 Onroad World Championship we have missed since going online in 2006.  Thankfully Simon, being the super nice guy he is, hasn’t held that against us and just before he caught his long flight to Chile we had a quick chat to get his thoughts on where he feels he is at as he attempts to become only the 3rd driver to ever win IFMAR’s original WC category more than once.  If he can pull off that feat he would also be the first non Italian to ever do so.  While legend of the category Lamberto Collari won’t be in Santiago for a chance at a 10th World title, and defending Champion Dario Balestri’s chances of a hat trick are on hold as he also wont be there, Simon did address the big talking point around this year’s 24th running of the Worlds – the absence of the entire Infinity team.  ‘I am disappointed that the Infinity drivers are not coming, it is a real shame for Kenji that none of them are coming, but no Infinity does not affect anything from my side in how we approach this race.  In the end there are still very good drivers there and you need to beat them and to beat them you need to work properly before the race in your preparations and then work hard when you get to Chile.  I have a really good focus on the race so from this side it does not change anything if Infinity are there or not.’

Now 33-years old, on where he expects his main competition to come from, without hesitation he replied, ‘Toni (Gruber), Shoki (Takahata) and (Andrea) Catanzani, Catanzani is fast and someone to really watch.  Maybe there will be some other surprises, we will see, but I think these are the guys.’  Asked the difference between the Simon of then (Brazil, 2015) and the Simon of now he replied, ‘There is not a big difference I would say.  A lot of things are the same, of course my focus outside of racing is a bit more into work.  Back at that point of my life I was studying and also had a great time with Silvio Hachler, who is a really good friend.  We studied together and could manage to do as much racing as we wanted to and it was an amazing time that time which also boosted us for good results and everything.  That is the main difference.’  He added. ‘On the other hand my father is still there racing with me and supporting me a lot.  Alex (Kempe) was also there in Brazil as support for Shepherd and now he is directly helping my father so we are looking forward to defend the title of South America.’  While the same dream team that helped him secure the TQ honours at the last World Championship in Japan 2-year-old, and this year’s European Championships, bSimon said it’s not quite the ultimate dream team, his brother having partnered his dad in executing the many pit stops en-route to becoming the World No.1 in Brazil.

Asked if 1:8 Onroad and its high revving little 3.5cc engines have notably evolved since the last Worlds, the class having had almost 50 years to perfect the concept, he said, ‘I think the engines made a big step again the last two years.  The cars have developed a bit also.  I see the difference with my new Mugen but also the other manufacturers have worked to get more from their cars so it is for sure a bit faster.’  On engine and in particular his own program with Ielasi Tuned, owner Daniele Ielasi a rival in Brazil but now one Simon’s key sponsors along with Energy Fuel, who supplied the control fuel for both the 1:8 GT and now the 1:8 Onroad Worlds, he said, ‘reliability is now on a really really good level compared to what we had over the past 10-years in our sport.’  He added this is the result of ‘development but also hard work from Daniele.’

Showing that their is no doubts over his outright speed in terms of being one of the fastest drivers on the planet taking the TQ in Japan on Infinity’s home ground only for a wing issue and engine tuning to thwart his effort in the final, Simon said, ‘this year at the Euros I could manage to TQ against all the Infinity guys and everyone so the speed is there yes, for us it is important to have a clean final.  That is the main focus and it’s been the focus for the last weeks and months in preparation to have more consistency there.  Even though in the last ENS it was not the perfect final race practice but things that happen you learn from them and they are over’.  Suffering a flameout in the last fuel stop at the ENS finale, he explained this was the result of a ‘quick & messy pit stop and lets say a lot of fuel came out and the engine flame out was due to that.’

On going to Chile armed with the new Mugen Seriki MRX7, it three years to the month since he made the switch from then German brand Shepherd after a long stint to the Japanese manufacturer, Simon gave the upbeat reply, ‘Actually it was a great season for the new car.  I could use it since ENS Ettlingen so I have a lot of experience. Durability and everything is as Mugen always was.  I think we could make another step forward with the car in the last month before that I couldn’t spend too much time on the track practicing due to other reasons. We will also get so much practice in Chile I think we will improve the car even further.  There is a lot to discover still.’

Having not yet sampled the track (at the time of our chat), asked his thoughts from what he has seen he replied, ‘It looks like Fontana (2018 WC host track).  I think the grip level will be more suitable for me than it was in Fontana because that was super high grip.  The layout in Chile looks good, and fast, so I think it will make for a proper World Championship.’  On that note we can’t wait to follow how it all unfolds at the impressive CACH facility.

Red RC’s coverage from Chile, which is presented by Capricorn, Radbody, T-Works, and IFMAR, will start on Tuesday (Dec 2nd) with four rounds of seeding practice and continue through to Saturday’s title deciding 1-hour Main,.


November 30, 2025

1:8 Onroad World Championship coverage presented by Capricorn, Radbody, T-Works, and IFMAR

Having hit a landmark of telling the story of how 50 World Championships unfolded when we reported on Marcus Kaerup’s 1:10 4WD Buggy World title win in Australia, Red RC is excited to be travelling to Chile to cover the 1:8 Onroad World Championship, our coverage presented by Capricorn, Radbody, T-Works, and IFMAR.  As we kick off the first of our next 50 World Championships, this one is special because it was IFMAR’s original World Championship category that was also the first World Championship to be covered here on Red RC back in 2007 in Argentina.  With a certain Lamberto Collari racking up the 8th of his 9 World titles, now 18-years later the championship is back in South America and having missed the last one Red RC are definitely going this time round for what in our opinion is the Formula 1 of RC Racing.  Unfortunately while Collari and all of his team-mates at reigning World Champion manufacturer Infinity won’t be making the trip to the amazing CACH facility in Santiago, we are still going to be in for the intensity that only a World Championship brings out in drivers and manufacturers.  While Japan 2023 winner Dario Balestri doesn’t appear on the entry list, it is led by three World Champions – Simon Kurzbuch (2016 World Champion, Brazil), Shoki Takahata (2019 World Champion, USA) and Toni Gruber (1:8 GT 2023 World Champion, Australia) – they will face the next generation of potential World Champions in the form of drivers like Andrea Catanzani who unlike the three World Champions has been to the track previously where he was the Top Qualifier at the IFMAR 1:8 GT World Championships back in September.

Our coverage is only possible thanks to the support of our sponsors and a specialist manufacturer born out of Nitro Onroad racing, Capricorn and its owner Patrizio Rossi have been staunch supporters of the category so we are honoured that they came onboard for this the 24th running of the 1:8 Onroad Worlds which was the founding category for World Championship RC racing when it crowned its first Champion in 1977!  A company that has been instrumental in Red RC’s World Championship coverage post Covid, US body producer Radbody, as fans of all things fast and aerodynamic, are the third of our sponsors making the fourth & final stop on the 2025 World Championship World tour possible.  Long time supporters of Red RC, aftermarket parts and accessories producer T-Works need no introduction and we are delighted to team up with them once again after they supported us last year in attending the 1:10 Nitro Touring Car WC at Huge RC in Thailand.  Having dealt with them at each and every one of the previous 50 Worlds we’ve covered, they are the ones responsible for the race that awards the greatest prize in racing after all, we are very grateful to the World governing body IFMAR for their assistance in ensuring the race with the longest history records will get an in-dept 2025 chapter update!  Red RC’s coverage will begin on Tuesday with Seeding Practice and the Opening Ceremony before we quickly get down to the serious business of qualifying with it all culminating with the crowning of a new World Champion on Saturday (December 6th).


November 19, 2025

2025 SIGP Offroad Chassis Focus Index

China’s top annual international offroad race, the 2025 Sunpadow International Grand Prix (SIGP) once again earned itself a reputation of being ‘challenging’, the 3 Circles track one where suspension set-up is critical.  Only the second edition of the race since its return to the former 1:10 Offroad World Championship venue following a 4-year break, World Champions Bruno Coelho and David Ronnefalk returned knowing what to expect.  For newcomers like Kouki Kato, who would go on to take the nitro win, Pekko Iivonen, and young Korean talent Jung Hyunkyu, the track would be a completely new experience that would test their set-up skills on a new level.  Ronnefalk summed up the SIGP track very well when he said, ‘You’re not justing battling the other guy, I feel like more here you are battling the track out there so that’s offroad.  It’s not many times you race on a track like this anymore so it’s good to feel what it used to be like in the old days I guess.’  With shocks the big focus of drivers, Belgian shock components specialist brand TRC busy assisting many drivers with getting their buggies dialled in, getting our hands on buggies for our Chassis Focus proved a little more challenging than normal as drivers switched shocks between Nitro and eBuggy.  In the end we managed to feature 10 buggies from 6 drivers and 4 different manufacturers and we have compiled them in our latest Chassis Focus Index.

Nitro Buggy

Kouki Kato – Infinity (Winner/Q2)
David Ronnefalk – Xray (Top Qualifier/P2)
Bruno Coelho – Infinity (Q3/P3)
Pekko Iivonen – Mayako (Q4/P4)
Jung HyunkyuTeam Associated (Q5/P5)
Adrian Wicaksono  – Team Associated (Q8/P8)


Electric Buggy

Bruno Coelho – Infinity (Top Qualifier/Winner)
David Ronnefalk – Xray (Q2/P2)
Kouki Kato – Infinity (Q3/P3)
Pekko Iivonen – Mayako (Q4/P4)


November 9, 2025

Kato takes thrilling last lap SIGP victory in China

Infinity’s Kouki Kato has just taken one of the most exciting wins of his career, the Japanese driver winning the Sunpadow International Grand Prix after a thrilling last lap duel with Top Qualifier & majority race leader David Ronnefalk following 45-minutes of racing around the very challenging 3 Circles track in Xiamen.  With Chinese host track of the 2017 1:10 Offroad World Championships famed for its challenging bumpy conditions, it looked like Ronnefalk had taken control of the race with the main battle being for second place between Kato and his team-mate Bruno Coelho.  However a track that even the world’s best respect as being one of the most challenge there is, it didn’t take much for Ronnefalk’s lead to be eroded.  Passed by Kato on lap 56 of 80, the 19-year-old with hold the former World Champion at bay for 9-laps until a mistake with 7-minutes remaining, the local crowd invested in the racing and providing exciting audio as the leading drivers fell foul of track conditions.  Back in front and with the clock ticking down, Ronnefalk would again get tripped up by the track on the penultimate lap.  Coming of the main straight side by side to start the final lap, just as the computer signalled the finish of the 45-minutes, the pair took the jump on to the back straight and touched in the air both buggies tumbling but Kato having the better luck landing on his wheels.  While Ronnefalk tried to get back in touch over the remainder of the 34-seconds lap it wasn’t to happen and Kato took the win, the crowd appreciative of the thrilling finish.  Behind, by over 8-seconds, it was once again Coelho, winner of the eBuggy finals, who completed the nitro podium while Pekko Iivonen and Jung Hyunkyu were best of the rest in fourth & fifth.

Picking up over $2,800 for his win, which is put up event organiser Sunpadow batteries, giving his reaction to the race, Kato said it was ‘Very exciting, the last 2-laps everything changing.  We had a good weekend because Bruno win EP and I get Nitro, so a wonderful weekend.’  Running through his race, the 19-year-old said, ‘the car felt the best of the weekend in the final so they gave me the best car for the race.  Also, I did have some mistakes, but I also have good pace so I just kept trying for the win.’  On his fuel stops, the Japanese National Champion phrased his father and team-mate Coelho’s mechanic Ricardo Monteiro for their role in his win saying ‘they did a very nice job’.  Asked the significance of today’s win, him winning the final Philippine Masters Race to be run at the famed Circulo Verde track earlier this year, he replied, ‘here is probably one of my best ever races.’

Asked for a run down on what from a spectators point of view was a very exciting race finish, Ronnefalk replied, ‘I wish I had of been on the other side of that finish of course but it was Kouki’s day, he had more luck when he needed to there towards the end.’  He continued, ‘It felt like he crashed a couple of times and landed on his wheels and every time I had a roll out there I was on the roof so that’s what you need to win the races and the luck wasn’t on my side in the last 5-minutes.’  His second time attending the SIGP Offroad race, he added, ‘this is not a track you can step down in terms of driving because you are going to miss your marks out there and lose a lot of time.  You have to push, I tried, but I had a tap there on the second to last lap on the pipe, saved it, he got by, and on the last lap he went a little wide on the difficult jump section coming on to the back straight.  I dived on the inside and we went side by side over the first jump and we both tumbled.  I ended up on the rough and he was the wheels, that’s it not much I could do.’  One the gap he had established in the middle of the race he said, ‘Everything was working very well but I had two rolls two laps in a row after building up like a 10-second cushion and both of those times I was on the rough so I needed a marshal and brought them back into the game.  It is frustrating when you lead like 95% of the final and then you don’t come out on top but it was a good race and it’s intense when you have that close of a battle.  You’re not justing battling the other guy, I feel like more here you are battling the track out there so that’s offroad.  It’s not many times you race on a track like this anymore so it’s good to feel what it used to be like in the old days I guess.’

Summing up his race as ‘tough’ Coelho explained, ‘I had some very good momentum in the final and some bad.  I felt like sometimes the car was really good and on rails but then I would grab some hole or something and I’d flip and then it was difficult to get back to the pace.  It was very difficult to keep that momentum during the 45-minutes and I think that is what cost me the fight for the win because I can’t say I would have been in front of everybody but I am sure if I didn’t make the 10 or 12 mistakes I made in the final I would have been with them in the front.  I was still not far away from them 5-6 seconds from them.’  With himself and Kato running together for much of the race, on this he said, ‘I would make a mistake and was able to catch him, and then another mistake and able to catch him all the time like this, until I make 2 or 3 mistakes in a row that pushed me back a lot.  My last 15-minutes were very good but not enough to catch back up.’  Also finishing third last year behind Italian duo Davide Ongaro (winner) and Top Qualifier Mattia Polito, asked how this year’s track conditions in the final compare, the reigning Touring Car World Champion replied, ‘It was probably a little bit easier to this year because last year was super slippery.  It was even more difficult to jump more jumps and this year you were able to jump so I would say a little bit easier than last year but still challenging.’  He added, ‘This is a very old school track so it’s the kind of track where the tyre doesn’t really make a huge difference but everyone was actually on the same tyres so it looks like a controlled tyre which is very good because that is were comes the pace.  The track is very rough and you need to be very calm but at the same time you want to capitalise and move forward but sometimes you pay for that.  I like it a lot and it is really challenging and always very difficult.’

Asked about his race to fourth, SIGP first timer Iivonen said, ‘It started quite bad, I made a couple of stupid mistakes.  After that I couldn’t really catch the guys and made some other other mistakes and then I stated to hear that my gears were cracking so I just wanted to save it til the end.  At least that paid out’ – the Finn collecting 3,000RMB in prize money for his efforts.  Summing up his first experience of the SIGP, the 19-year-old said, ‘it’s a tough track so I think I did quite good overall.  My pace was there but I had a couple to many mistakes and maybe the cars were slightly too hard to drive.’   Asked if it was a track he would like to take on again, he said, ‘I think I would be happy to come back here for sure.  I would say like David (Ronnefalk) this is old school kind of racing.’

View our event image gallery here.


November 9, 2025

Chassis Focus – David Ronnefalk (Xray)

Chassis – Xray XB8’25
Engine – FX K303
Fuel
Tires – Hotrace
Radio – Sanwa M17S
Servos – Hitec HSB9381
Body – Xray

Image Gallery


November 9, 2025

Chassis Focus – Pekko Iivonen (Mayako)

Chassis – Mayako MX8-LCG 2.0
Engine – O.S. Speed B2105
Fuel – Nitrolux
Tires – Hotrace
Radio – Sanwa M17
Servos – Savox SB3290SG (steering & throttle)
Body – Mayako

Body – Pekko’s buggy is fitted with Mayako’s new LCG 2.0 parts and Floating Steering Mount.  Thanks to his ‘Green’ Glow Stick RC Antenna his buggy really stood out on the track especially when running in the evening.

Image Gallery