Four-Stroke

Whilst doing some googling I spotted this Motobi trials special and thought I'd post it. The frame/swingarm and forks are not OEM Motobi parts. cheers, Michael

How are people who've gone from 2t to 4t bikes finding the change??? Its taken me about 10 hours to feel really comfortable, but a lot of this was down to bike set up!!

I was wondering what the diameter of the front pipes are on the different 4 strokers, My new 08 scorpa 250fr is about 40mm

Just wondered if anybody has had much trouble with there 4 stroke trials bikes??? i've heard something about a casting breaking inside a 4rt motor??? and rev4 head gaskets?? anybody know of other faults???

Want to see a groundbreaking new 4 stroke mmmmmmmmmmmmmmmmm

Has any body with a monty 4rt had it totally deristricted and if so did it make a big difference

Is the paint finish on monty repsol wheels a matt,semi or full gloss finish

I'm thinking about buying a 4 stroker any one rode all of the different bikes?? How do they compare??

What do you think gas gas will say now the 4rt is the worlds best trials bike there will be loads of people saying raga could of retained his champs if the final round had not been cancelled i feel sorry for bou he has been short changed,the spark has been taken out of his win, When he wins again for the next few years lets hope there will be no contraversy

I have heard all the stories that modern unleaded fuel goes off and has a very short shelf life - I was a ltlle scheptical but now I know its true. Took my trusty old TLR to a trial yesterday along with a tin of petrol from the shed - suspect the fuel in the tank was same age - no more than 4 weeks old. Normaly I give the bike a run the day before just to check all is well but this time was a last minute effort. Loads bike on trailer and off I goes, usually i top up with fuel on the way - dont bother since running late. Starts bike on choke - sounds bit rough - unusual for this bike, its normally trouble free and was perf4ect the last time I used it. lots of smoke…

Got a play on the first one in the US at the TTC weekend! Quite nice! Impressions are,(though quite subjective) quite strong off the bottom, much like the Honda, but will chug down to nothing where the Honda stopps running and spits you over the bars, and still recover with lots of power! After it cought me by surprize and put me on my butt, I respected it a bit more(first to crash it too) after the floater became a flip turn that I was not ready for! Stronger in the lower revs than the 2T 250 I think! Maybe even the 270! After that it seemed to flatten out to a very rideable and linear power much like the 4T Scorpa, which is very linear all the way through the revs, a…

Most of the top world riders were in Spain for last weekends Spanish National in preparation for the upcoming worlds I noticed that there were seven factory riders on 4 strokes in the top 11 and only four riders on 2 strokes.

Just read artical about the future of the fourstroke, and wondered what sort of tripe you could come up wi bet it's nowt to do wi bikes

Yes I have ridden all so far, good and bad within the lot, but one thing is for sure, a carburator has its limitations, specially on a four stroke, it is simple physics, and has all been done before. You will not be able to ride it like a 2T, end of story! It will spit at you, and at the worst moment! 250 cc will work for the average rider, which may just be the 200cc = of the 2T which most need anyway, but Sherco and Honda both figured out early on that it would not work in WTC competition. Scorpa has already proven that it takes 150cc in a 4T to really make the bike move! Roumours have it that the Gasser 4T will have a flat head motor, not sure the displacement, I wo…

Reading posts about the new Beta due to be unveiled soon, makes all brands but GG with a four stroke in the works. Any news when it will become mandatory for the world championship ? I don't think Beta are getting the jump on Sherco DP, the 3.2 is one hell of a machine to ride, had it's initial problems, I was able to get mine performing, and the factory will no doubt be on top of the job, Fuel injection isn't beyond any of the factories, it may be the cost it adds to the price of the bike that may be the big factor, you get a good bike with the Mont, but you do pay extra for it. I think I read in the last Sherco mail news that they were contesting the WR with fou…

Does anyone know if sherco have sorted their hot starting problem on the 4 stroke 320 yet ??

fugi wins again could a fourstroke win the world champs in only its second year? everone was verry vocal when they came on the scene,but now theye are giving raga a run for his money its all gone quiet. come on fugi (prefferably doug but fugi will do)fly the fourstroke flag HIGH>>>

As the title says what are the differences between the two bikes technically and aesthetically ?, I'm moving towards buying one second hand so any information would be greatly apreciated. Thanks H..

As they say apicture is worth a thousand words.

Just looking through the sanifords ebay shop and noticed this beast of a thing! here