350 pv how reliable is it

[catch me if u can]

i am thinking about putting a 350 pv running on race gas(high compression) on my 88 250 r it has a new crank and bearings with a lrd big bore exhaust and a 38 mm carb with v force 3 reeds i was wondering how reliable the motor would be and what would i have to change on my motor to accept this power gears,clutch,sprockets or could i leave this stuff alone and it will hold up to the power or not (i want a fast motor but a reliable motor that i dont have to work on all the time )

[Bad Ass Honda 250r]

it will be reliable if you want to spend a good chunk of money on aftermarket transmission gears...

[catch me if u can]

are yukon gears any good and does any one know how much a set of oem gears are i have heard of people having no trouble out of ther gears with this much power but i dont know much when it comes to making this much power on a 250r motor

[Bad Ass Honda 250r]

well i am pretty sure it would destroy the stock gears if you build it well. i would personally just get a 265 or 270 pv cylinder.... do you realy need much more than 55 hp????as far as clutch goes.... get some damn good springs and the clutch should hold up....

[catch me if u can]

i want all that horsepower to beat all my cousins 700's and can i say i want to beat them bad because i get tired of all there trash talking and i want to drag it locally every once in a while

[Bad Ass Honda 250r]

ooooh.... well my 250r can beet a raptor 660 right now (if my 250r can get traction)... doesnt even have a big bore kit....

[lilredridenwood]

IMO the powervalve on a big bore is a waste of money. All the engine builders and tuners I talk to tell me ditch the pv and it will run better. You will lose power on the low end but gain it on the top. If you do decide to go with the PV stay away from the ESR, the valve is not big enough to acomplish what it is supposed to. I also had a pv failure in april the stop fell apart and let the valve fall down into the cylinder! it stopped quick!!! bent the shit out of the pv, buggered up the piston wich only had about 8 hours on it, just got the cylinder back from ESR today. I had them install a powervalve block off plug. No more powervalve!!!!!!!!!!

[drag lt guy]

lol you dont need a 350 PV to pull a 700r... my 250 beats 450's, 660's, and 700's all the time and its just .60 stock stroke. I would say get a +4mm hot rods stroker crank and a good port job from FloTek. Get an ESR trx5 pipe and a 39mm carb with some V-force reeds or even ported stock cage you'll be fine with beating a 700.

[Bad Ass Honda 250r]

Originally Posted by drag lt guy

lol you dont need a 350 PV to pull a 700r... my 250 beats 450's, 660's, and 700's all the time and its just .60 stock stroke. I would say get a +4mm hot rods stroker crank and a good port job from FloTek. Get an ESR trx5 pipe and a 39mm carb with some V-force reeds or even ported stock cage you'll be fine with beating a 700.

pretty much what i have and i can beet 660's

[atcsteve]

I like the 330's(bolt-on's),that is a good reliable motor with more than enough HP to get a 700! Also your oem tranny will hold up fine.You may want to change to a hinson clutch kit,and go to a 40.5 carb.You'll have the raptor rider crying in no time!!!! The only problem you may have is wheelies,if you dont extend the swingarm,and that hurts in a drag!!I found that 4" is not enough on a 330,but 5-6" is perfect.Once you go to the 350-380cc's you need 8" to keep it down for the most part!Good luck!