say i want to put a wiseco piston in my 200es. which one do you get, there's like 7 diffrent ones. which one would work best?
At The Back Of The Pack
Arm chair racerAt the back of the pack
say i want to put a wiseco piston in my 200es. which one do you get, there's like 7 diffrent ones. which one would work best?
84'200s (Dad bought new in 84, long gone)
84'YTM200 (sold 02)
85'KLT160 (sold 05)
84' Big Red (Cobra exhaust,good shape) sold in 08
84' Big Red (Parts Bike, runs good though)sold in 08
85' 250SX (New plastic, Clark Plastic Gas Tank, Web Cam Camshaft, Cobra Exhaust, Moose Jet Kit, etc..) sold in 2010 and highly regret!!!
04 Polaris Sportsman (Swapped 400 motor with a 500, Polaris wheels w/Kendra Bearclaws, Moose Fender Flares, Brushguard, Warn Winch)
84 200s (Needs work!)
Power User
Lord of the trike
The 10.25:1 compression one, if you get the 12:1 then you would have to run race gas. As for size it depends on what type of shape your cylinder is in, don't go larger then you have too. Pull it apart and inspect before ordering, you might be able to just hone the cylinder or you may have to bore it.
1984 Yamaha YT 60 Tri Zinger(current project)
1983 Yamaha YTM 200 (rear suspension kit)..... long term project
2004 BMW R1150R
1972 Honda CT 70
2007 Lifan 110
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Arm chair racerAt the back of the pack
it dosen't smoke or anything, but i might have to do the headgasket soon. i my as well put a new piston in it while i have it apart. thing is tho, when i did the piston in my yamaha it burned oil later. i'm just kinda nervous i guess
84'200s (Dad bought new in 84, long gone)
84'YTM200 (sold 02)
85'KLT160 (sold 05)
84' Big Red (Cobra exhaust,good shape) sold in 08
84' Big Red (Parts Bike, runs good though)sold in 08
85' 250SX (New plastic, Clark Plastic Gas Tank, Web Cam Camshaft, Cobra Exhaust, Moose Jet Kit, etc..) sold in 2010 and highly regret!!!
04 Polaris Sportsman (Swapped 400 motor with a 500, Polaris wheels w/Kendra Bearclaws, Moose Fender Flares, Brushguard, Warn Winch)
84 200s (Needs work!)
Power User
Got the holeshot
if its not burning oil now why mess with something thats not broke? also how do you know the head gasket needs to be replaced soon? Jim
At The Back Of The Pack
Arm chair racerAt the back of the pack
i kno what you mean. anyways it seems to be leaking a bit of oil.
84'200s (Dad bought new in 84, long gone)
84'YTM200 (sold 02)
85'KLT160 (sold 05)
84' Big Red (Cobra exhaust,good shape) sold in 08
84' Big Red (Parts Bike, runs good though)sold in 08
85' 250SX (New plastic, Clark Plastic Gas Tank, Web Cam Camshaft, Cobra Exhaust, Moose Jet Kit, etc..) sold in 2010 and highly regret!!!
04 Polaris Sportsman (Swapped 400 motor with a 500, Polaris wheels w/Kendra Bearclaws, Moose Fender Flares, Brushguard, Warn Winch)
84 200s (Needs work!)
Just Too Addicted
Arm chair racerJust too addicted
more compression=more power
At The Back Of The Pack
Arm chair racerAt the back of the pack
will just putting a piston in it do that, or would i have to bore it out? i don't want to get to crazy.
84'200s (Dad bought new in 84, long gone)
84'YTM200 (sold 02)
85'KLT160 (sold 05)
84' Big Red (Cobra exhaust,good shape) sold in 08
84' Big Red (Parts Bike, runs good though)sold in 08
85' 250SX (New plastic, Clark Plastic Gas Tank, Web Cam Camshaft, Cobra Exhaust, Moose Jet Kit, etc..) sold in 2010 and highly regret!!!
04 Polaris Sportsman (Swapped 400 motor with a 500, Polaris wheels w/Kendra Bearclaws, Moose Fender Flares, Brushguard, Warn Winch)
84 200s (Needs work!)
At The Back Of The Pack
Arm chair racerAt the back of the pack
If your trike isnt smoking and your compression is good then replacing the piston and rings is not necessary. You dont need to mess with it. Honestly if your going to tear it down to replace the gasket why just not go with a set of rings. Yes a 10:1 piston is going to produce a little more but I would bet you will not be able to tell one with a 10:1 and one with the stock compression ratio. I would tear it down replace the gasket do a very light hone on the cylinder replace the rings and not worry with the piston and save about 80 bucks.. good luck
86 350x "O' Smokey"
83 200 auto X
84 200x
85 110
82 70
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Arm chair racerAt the back of the pack
I forgot to mention i would also replace the valve seals while your at it...
86 350x "O' Smokey"
83 200 auto X
84 200x
85 110
82 70
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Arm chair racerAt the back of the pack
i probably won't do eithier. i just want to ride, ya know. unless it gets really bad, i'll do something about it. just asking about it.
84'200s (Dad bought new in 84, long gone)
84'YTM200 (sold 02)
85'KLT160 (sold 05)
84' Big Red (Cobra exhaust,good shape) sold in 08
84' Big Red (Parts Bike, runs good though)sold in 08
85' 250SX (New plastic, Clark Plastic Gas Tank, Web Cam Camshaft, Cobra Exhaust, Moose Jet Kit, etc..) sold in 2010 and highly regret!!!
04 Polaris Sportsman (Swapped 400 motor with a 500, Polaris wheels w/Kendra Bearclaws, Moose Fender Flares, Brushguard, Warn Winch)
84 200s (Needs work!)
Registered User
New to the board
If you are going to take the top end apart you might as well rebuild it. Start with having your cylinder miked from your local cycle mechanic to see what bore its on. Then rebuild your head with some new valve guide seals and lap your valves while you are at it. If you run Alky and a high compression piston I think you are supose to use stainless steel valves. I ran a 10.5:1 on my 350x and they work great. DO NOT put a forged piston in your cylinder with out having it bored to match. You need the clearence and forged pistons expand and could seaize your top end, shatter and blow your bottem. Lots of nasty stuff. Just a set of rings, and a hone to deglaze your top end with some new valve guide seals will give you a brand new bike.
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