Has any bored their warrior to 366?

[warriorrider11]

I was thinking of getting a JE 12:1 piston and boring my warrior out to 366. What excactly would be involved in this besides buying the kit? would I need a new sleeve? and has anybody else done it, is it worth it?

[gotwarrior]

The 366 kit is just a pistion a set of rings and a new pin and clips. If you cylinder is fine.. all you have to do is hone it and put the a stock bore 12:1 pistion in... Boring isn't always required..

[warriorrider11]

really? Well I decided I do not want to go with 12:1 compression because I dont want to run race fuel. So what about this kit

Wiseco Piston Kit

Would I need to get it bored with that kit. What kind of power will I get from it?

[J0nnori]

resend the link its not comin up

[warriorrider11]

freakin a, just try and copy and paste this

http://cgi.ebay.com/ebaymotors/ws/eB...6711&rd=1&rd=1


But if it doesnt work, heres just a copy and paste of the description on ebay



New Wiseco 4419M08400, .040 bore (84.00 mm bore) piston kit for Yamaha 350 atvs. Fits the following models:

YFM350 Warrior, 1987-2004
YFM 350 Big Bear 1987-1999
YFM350FX Wolverine, 1995-2005
This is a 10.25:1 compression piston. Stock compression is only 9.2:1.

Wiseco pistons are known for durability, longevity, and increased horsepower. Innovative forging design and piston skirt provides maximum horsepower and torque.

[dave76]

I had the FST 366 kit, it was a JE at the time 11.1:1 compression now 10.5:1 piston and a Megacycle 252X1 cam. I also had a white brothers e series pipe and k&n filter. Mickey Dunlap of FST said it would make 29HP. It's a good kit and I do recommend it.