tony27 Posted August 9, 2013 Report Share Posted August 9, 2013 Reality is that 4stroke trials bikes require more work to maintain than a 2stroke trials bike, generally the only work needed on the engine is gearbox oil changes & air filter cleaning where the 4stroke you also have engine oil to do & valves to adjust. Trials bikes require next to no work on a daily basis compared to the higher tuned motors in most bikes, I've only done 1 possibly 2 piston kits in my Jarvis which was delivered August 04 & it's done 1000s of hours of work & they were only done as a precaution rather than because the motor was noisy or lost performance, the muffler condition has more bearing on power especially bottom end Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted August 10, 2013 Report Share Posted August 10, 2013 try out the ST 305 also, you may be pleasantly surprised>>> Hey up borus whats this recommending Sherco when youre THE OSSA man???????????????? :unsure: :unsure: :stupid: :stupid: Quote Link to comment Share on other sites More sharing options...
tony27 Posted August 10, 2013 Report Share Posted August 10, 2013 I think he may be both now Quote Link to comment Share on other sites More sharing options...
borus Posted August 10, 2013 Report Share Posted August 10, 2013 not both, just Sherco, Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted August 10, 2013 Report Share Posted August 10, 2013 Who said a leopard cant change his spots? 2 Quote Link to comment Share on other sites More sharing options...
copemech Posted August 11, 2013 Report Share Posted August 11, 2013 A virtual plethora of knowledge waiting to spew furth! Welcome Back Borus! Quote Link to comment Share on other sites More sharing options...
perce Posted August 12, 2013 Report Share Posted August 12, 2013 Who said a leopard cant change his spots? just checking that you used the word cant there, first read through didn't look like it. 1 Quote Link to comment Share on other sites More sharing options...
copemech Posted August 13, 2013 Report Share Posted August 13, 2013 Did you know HE was the first to have a 305 Sherco? This goes back to years of development! Quote Link to comment Share on other sites More sharing options...
borus Posted August 13, 2013 Report Share Posted August 13, 2013 I still have the piston and cylinder in very good shape, that was a 2007 Caby I believe. Back then I preferred the 305 over the 290 also. Quote Link to comment Share on other sites More sharing options...
climber Posted October 21, 2013 Report Share Posted October 21, 2013 New 4-stroke Sherco A friend of mine tried to order a new Sherco 320 four stroke trials bike last month through the Sherco dealer in Norway. They couldn`t get it delivered. Sherco wouldn`t confirm that they have stopped making them. So now my friend awaits a new 2-stoke 305cc. I still have my 2007 3.2F and I find it very fun to ride. Last week I made a change to the engine that has transformed the bike very much. I did put a restriktor plate between the cylinderhead exhaust outlet and the exhaust pipe. This is a 3mm thin washer with an outher diameter of 43mm and a 24mm opening in the middel for the exhaust gas. The Sherco exhaust pipe has a 36mm internal diameter so this reduction looks quiet much but the Honda 4RT has a lot thinner exhaust pipe than the Sherco. This restriktor plate has taken away the wildness of the 2007 model. Now it is very much controllable and smooth. A couple of years ago I also installed the Kehin PWK 28 with the SPS system. This came on the later bikes. So if you have a 2007 bike, and you find it to wild and a handful as many say they find them, I would recommend to try this small change. Have a washer made and try it out. For me it is another bike now. I am 57 years old and Norwegian trials champion of 1976. Best wishes from Norway Quote Link to comment Share on other sites More sharing options...
charlie chitlins Posted October 22, 2013 Report Share Posted October 22, 2013 I am 57 years old and Norwegian trials champion of 1976. Best wishes from Norway COOL!!! What did you ride in '76? Can you post some pics? Some of us remember that time well...or are just beginning to forget it! Quote Link to comment Share on other sites More sharing options...
climber Posted October 26, 2013 Report Share Posted October 26, 2013 Hey to Charlie Chitlins In 1972 I bought my first real trialsbike. I was 16 years then. My first bike was a 250cc Montesa. The one with the white frame and big wheel hubs. In competition I was no allowed to ride this as a sixteen year old so I took out the engine and put a east-german MZ 125cc engine into it. It work very well with a larger rear sprocket on. My second bike was the 1974 OSSA 250cc. I bought this a little used in 1975. The OSSA was a bit more easy to ride than the Montesa. In 1976 I bought an almost new Bultaco Sherpa 350 which was a 323cc bike. Thats the one i used to win the championship. I believe Martin Lampkin was the first world champion ever in 1976 and he rode such a bike. Any picture I dont have on my present adresse.. So when I took up trialsriding again in 2007 after a 30 years pause I wanted something different and that had to be a four-stroke bike. I revs half as fast as the 2-stroke and it ignites not each revolution, but only every second time. So it is much clooser to your heartbeat. Perhaps that is why I am facinated with the fourstroke enigine. It is calm and it calms you down and makes you smile. And the world champion ride one. My friend who now wanted a brand new Sherco four-stroke already has the 2009 ST 320F. He also has likes them very much and wanted a new one. I think Sherco should develop the fourstoke engine further and put a good rider one the bike, for example Alexander Ferrer. I think Cabestany rode better one the four-stroke bike as he does now on the 2-stroke. It was more magic present then and the riding itselt looked more like a dance. That was all from me this time. Thanks. 1 Quote Link to comment Share on other sites More sharing options...
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