426 Cam chain jumped time?
Posted February 14, 2006 - 09:10 AM
My delima is this: If they are gonna rebuilt the top end, what would YOU do to increase performance while you were in there? I can probably afford an extra $300 or so for upgrades vs. stock. They gave me a ballpark of $1000 to $1500 for the topend rebuild. Right now, they are looking at the bottom end. (Which should be fine!) The bike is stock, and I trail ride and hillclimb.
Posted February 14, 2006 - 08:24 PM
Posted February 15, 2006 - 08:57 AM
Posted February 15, 2006 - 08:34 PM
Posted February 15, 2006 - 09:19 PM
Thanks for the reply. If they question the condition of my piston, I'll definitley be looking at your suggestion. Is that a stock size, or did you have yours bored out? if not, what kept you from a big bore kit?
My cylinder was in perfect shape, so I couldn't justify the bigger bore.
Posted February 15, 2006 - 09:28 PM
With the high comp piston you will most likely have to run very expensive race fuel. I would go with the port and polish. My dad had it done on his 450 and it was definitly worth it. You may lose one hp on the bottom but gain 3 on top. With the high comp it will also make it harder to start. I would go with stock piston or at least stock compression and go with port and polish. It already has plenty high enough compression.
You can still run pump gas, as long as it doesn't ping. Harder to start? The extra punch is well worth the slightly harder kick.
Yamaster, don't take this the wrong way, but, you need to ride a stock bike and then a bike like mine before you post a recommendation on the internet. I bought my bike brand new and have done every modification myself and seen first hand what works and what doesn't.