ok so i want to bore my fourwheeler to a 416 but have no clue wat to get if u could give me a list and a site to order from it would help alot thanks tad
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Senior Member
bore help
ok so i want to bore my fourwheeler to a 416 but have no clue wat to get if u could give me a list and a site to order from it would help alot thanks tad
2007 trx450er rossier full exhaust, k&n filter, HRC kit.
02 400ex
im doing the same thing so help us out.
2002 406ex
Elka triple rate zps shocks with remote rezzies, Laeger +2 a-arms
Lonestar braided brake lines with billet clamps, Houser +1.25 swingarm
Burgard +1 steering stem
Lsr anti-fad locknut, HMF full exhaust, port and polished head, 11:1Wiseco piston,GThunder HD head studs, Hot Rod crank, EBC clutch/ HD springs, Pro armor kill switch, Durablue axle, RAD bearing carrier, AC pro peg nerfs
IMS ROLL Intimidator bumper
Maier silver race plastics with carbon hood and K&K seat cover
18"kenda klaws mounted on itp rolled rims, Tusk billet gas cap
2003 YZ450F: pro taper, factory connection, twin air
Originally posted by PeeWee21
Grow up and realize is not the fact of what you ride...it's the fact that you ride!!!!! Come back and talk to me later when your nuts have dropped.
Senior Member
bump
2007 trx450er rossier full exhaust, k&n filter, HRC kit.
Registered User
Either go to a local performace tuning shop or get on Google and start searching. The items you need can be obtained from any of many dozens of sources. Don't forget to check E-bay--lots of new parts sold there for excellent prices.
At the minimum you'll need the piston (87mm is a 416) and new top-end gaskets. A service manual is also manditory in my book. It's worth having for the torque specs alone. Piston choices include JE, Wiseco, and Ross. Wiesco is popular--I slightly prefer JE. The piston should include rings and the wristpin.
Consider what compression ratio you want/require. Stay at 11:1 or under to use premium pump gas. I've found 91 to be marginal with even 10.8:1 w/ hard running. I'd guess 93 would be OK at 11:1 (and perhaps marginal under extreme conditions). Running a pump gas race gas mix is never a bad idea to eliminate detonation concerns.
I installed heavy duty head studs (source: GT Thunder) and had the top of my cylinder sleeve O-ringed (stainless steel O-ring). These mods add strength and longevity (far lower chance of blowing the head gasket). With a less than 11:1 416 piston those mods may not be necessary--I'm sure lots of folks don't do either.
I would also upgrade your cam while you're in there. Hotcams stage 1 or 2 seem popular. I'd go stage 2.
You'll need to take your new piston with you to the machine shop when you have your cylinder bored and honed.
So, that's not exactly a "how to" guide, but it should give you something to go on.
Also, see here: http://www.exriders.com/vbb/showthre...hreadid=221740
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