Topic: New plan of attack for the project.

[72cafe]

So I got to thinking yesterday-Why do I need an 836 kit? I mean, I'm happy with the performance of the bike now. I know with porting and polishing the head, carb work, etc.. it will be much more responsive and reliable. I could save myself a ton of $$$ by keeping the stock parts and replacing attaching parts.

So, I am thinking that I will have the cylinders and pistons checked for roundness and make sure the cylinders are parallel, port and polish the head and have it pressure tested (is there a way I can do this at home with a compressor?), keep the valves as they look pretty good and maybe have them ground, check the guides and seats on the head, have the crankshaft checked to make sure it isn't bent and MAYBE ream the oil journals out a bit, new cam chain and new stock tensioner, oversized piston rings... Anything I'm missing/don't need?

[clintinga]

Hey,

I saw this website on another message board the other day.  It is a guy who builds race engines and has some tips on getting more power from an engine.  His ideas really go against the grain but when you sit back and think about them they really make sense.  You just sign up by giving your email address and then you can look thru all of his performance articles he has written.   Their is an article about intake porting that is really interesting.  Hope this helps.

http://www.mototuneusa.com/

Clint

[eurban]

One thing to consider is what type of characteristics you want for the engine in your project.  You are relatively happy with the performance of your engine but it sounds like you want to maximize the power, smoothness and reliability of a stock displacement engine.   Keep in mind that even with a skilled port and polish job that you are probably going to soften up the power on the low end a bit.  What's good for higher RPM power usually is at least somwhat detrimental to power at lower RPMs.  Porting without alot of experience and or flow equipment will likely have a much greater impact on low RPM power loss. . . ..So to now actually take advantage of your improved higher RPM breathing are you going to go for a "hotter" camshaft and modify the valve train to reliably handle the revs at which your engine would actually be  making more power?  Are you going to be willing to operate the engine in these higher RPM ranges to take advantage of this?  What has happened to reliability in this process?  How much have these additional changes softened the lower RPM power of your bike? How much of a dent have you now put in your wallet?. . . . .  Increasing displacement and compression ratios will regain (and perhaps even add some compared to unmodified stock displacement) lower end grunt to your flowed / cammed motor.  You could also work on loosing weight from your bike (or even yourself) to help offset low rpm power loss.  Hope this helps.