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Discussion Starter #1
hey im looking on buying a motor for my 87 R an im wondering what would be better for more of the motocross stuff jumping/etc the 310 or 350?
 

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What do you mean by motocross stuff and jumping? Just play riding on a motocross track or what?
 

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Discussion Starter #3
like if u go to a track the jumps they usually have there. decent size and everything. like actual racing
 

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i think the 310 is a better mx motor since the revs still climb fairly fast and the power isnt too fatiguing. i have heard of pro lever riders getting their butts kicked by 350's. a nice ported 310 will be plenty of power for the track.
 

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i agree 310. you could probably get away with a 330 though and it will give you a bit more bottom also depends on what else your mtr needs ie. bottom end work
 

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i agree 310. you could probably get away with a 330 though and it will give you a bit more bottom also depends on what else your mtr needs ie. bottom end work

Well I disagree totally, the 350PV can have the most bottom end between the two and a very smooth powerband when piped with a Paul Turner "Race 2003" pipe. It is less fatiguing than any other setup because it has so much "craw down " power that is so important in MX (not having to shift as much). I don't think its any faster than a great running 265-310PV but is has more bottom end and is easier to ride when built correctly.
 

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310 or 330, IMO. I had a TC racing 330 open A bike and loved it on the track. IMO, skill level has a lot to do with engine size as well. If you are a novice or amatuer, it might be a handful to have a 330 or 350 motor.
 

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I race competativly using a stock cylinder that is bored .80 over. I have no problem with clearing any jump I want. A 310 will get the job done, and then some. I can't speak as to whether a 350 is a handfull or not.
 
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