top end help

[L TRAIN]

 first time here so please be gentle . i need a new top end . current set up is bored 3 over ,no porting . found a prodesign  cool head kit complete with new jugs. issue is the new jugs are standard bore. if i go with the smaller bore is it going to be very noticeable power wise or will the cool head set up make up the difference .

[Schweet97Z]

Bore has no affect on power.


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[Schweet97Z]

That being said what kit are you looking at? Or did you buy it already?


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[L TRAIN]

i have not purchased anything . researching my options at this point .the kit was a pro design kit on ebay . comes with everything from the studs in the case to the head . 21 cc domes

[camp0429]

Look at the top of your pistons and see what size they are for sure, or measure your cylinders. You may not need new cylinders if there is life left in yours.

[Schweet97Z]

What’s your budget? And riding style. Maybe we can get you pointed in the right direction, but definitely measure your bore on your current cylinders that way you will know if you need a new bore and pistons or new cylinders all together.


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[trickedcarbine]

You said new cylinders? Post a link. If they are crime Niche, keep what you have. 

[L TRAIN]

i ride mainly sand dunes . budget is tight . under a grand . yes i need  to measure the cylinders. i am pretty sure i have room to bore them . it is low on compression it did not melt down . i was happy with its current power . trying  to decide if i am giving my money to the machine shop or spending on parts

[Schweet97Z]

Driveline Assassin cylinders. Bolt on power. Assuming your bottom end is ok.


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[L TRAIN]

Banshee 350 Stock Bore 64mm Cylinders Top End Rebuild Kit Pro Design Cool Head eBay.url . this is the kit on ebay i was looking at .

[trickedcarbine]

Keep yours and get them honed. You can then spend the rest on some basic upgrades like a head, timing plate, reeds, etc.

[L TRAIN]

sounds good already have reeds , timing plate , lighter flywheel and , pipes  .  i don't think i want to put the assassins on a stock crank . i will find something to spend the rest of the cash on i am sure

 

[Ayesully810]

17 minutes ago, L TRAIN said:

sounds good already have reeds , timing plate , lighter flywheel and , pipes  .  i don't think i want to put the assassins on a stock crank . i will find something to spend the rest of the cash on i am sure

 

stock crank will be fine as long as its welded

[L TRAIN]

thanks i will keep that in mind

[JUSTWANNARACE]

If yours are ported and have life left in them just keep them and have them bore. If you buy new cyls they most likely won't be ported so that's where you will loose a ton of power. And it would cost $300-$500 to have the new ones ported. Just make sure you take them to a reputable machine shop that has bored atv cyls. Figure out what size pistons are in it currently and get the next size. If the machine shop tells you they can bore your cyls WITHOUT the pistons turn around and RUN. jmo