how many mods will be needed? worth it? have you seend the ports on an fl400? they;re HUGE. well any help? thanks

 

It's been done. Great power. The quality of the cylinder itself is the problem. It'd be a good project. Toss up between that and a cr500 cylinder.

 

Not feasable for most people. They do make alot of torque, but the work to make it mate is extensive. but the biggest problem is that if anything in the motor lets go it usually ends in a set of cases with a huge hole in the bottom of them. the cr500 idea is way too much for most people as well. it requires a ton of work. my advice would be to have a 370 prox set up built. fast, reliable, not that expensive.

 

look to spend around 4000.00 they say 2800.00 but the time you get the carb pipe and gears basket and all the nessisory things its around 4. call mp racing asked for steve tell him mark from mad racing sent you and ask for the polaris honda motor. its a 416 cc screamer

 

ya it is the 416 powermax powervalve motor 85hp i want one some time

 

Guess what guys .......FTZ does and offers the kit, just go to their website --------------------------------------------------------------------------->FTZ RACING

Later
Superstar

 

Those motors arent anything to brag about. Ive seen several and they didnt run like you would expect them to.

 

Why would you put a fl400 cylinder on a 250R. C-mon just put a bike engine in it. Its a lot cheaper and less work for the same or most likely more power

 

FTZ is not the ones I'd have do it. They don't stand behind their work. Speaking from my own experience.

 

pilot motors are extremely fast. They'd destroy a polonda without even sweating it. You cant tell me youd think a 520 Pilot cylindered 250r wouldnt be fast...aside from that it holds the record for the fastest 250r based motor in a 100 yard drag in the world

cr500 cylinder hybrds arent impressive