Have a performance cam for Web-Cam on my 250sx. With the new cam, will the valve clearances be any different, or the recommended clearance in the manuel?
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Arm chair racerAt the back of the pack
Have a performance cam for Web-Cam on my 250sx. With the new cam, will the valve clearances be any different, or the recommended clearance in the manuel?
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!)
Testicles between my toes at the devils backbone
Teaching quads a lesson
They should be the same. If not it should say with the new cam.
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At The Back Of The Pack
Arm chair racerAt the back of the pack
I got heavier springs too. It all came with 3 pieces of paper that say different things. Oh well, i'll use the recommended clearance. Is it really .003 in.? That is really, really tight!
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
yea the clearance is very tight usually between 2 and 5 thousanths,intake and exhaust.double check your manual
1985 ATC 250R.Team Red Trike
Power User
The day begins with 3WW
i hope you got hardened rockers or else your going to rip the cam pads appart. web can hard weld them and redo them for $65 each rocker. so it's not horrible. i had to do this to my 200e big red when I used a stage3 with performance springs and titanuim retainers.
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At The Back Of The Pack
Arm chair racerAt the back of the pack
Got just the mild cam. Shouldn't be a problem. No bore or performance piston or anything.
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!)
Got The Holeshot
Arm chair racerJust too addicted
i used hard weld cams in my 350X and 400EX over the years with stock rockers and had no problem. the cam in the 400EX has hundreds of hours and never took out a rocker. just make sure that you keep your oil changed often. and also use a good quality ATV oil. i would also recommend 20W50 year round. in the cold weather it will smoke on start up a little but won't hurt it. it also depends on the ramp speed of the cam lobe, but most mild cams will be fine with stock rockers as long as you pay attention to the oil. as for clearance i would go with .001 looser than the stock recomendation. i think you are right on the .003 being stock i would go .004 to start with. if you go .003 then i would look at the heal of the cam lobes after about an hour of ride time to see if there are any signs of it rubbing the heel. i ran .003 with the 350X and a hard weld web cam but it was just a slight bit tight.
Last edited by jensenracing77; 12-02-2009 at 09:54 PM.
At The Back Of The Pack
Arm chair racerAt the back of the pack
Read a little more into it, and thats exactly what they call for. Got it back together now, just have to throw it back in. Prey that it runs again!
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!)
Got The Holeshot
Arm chair racerJust too addicted
LOL! you're at the same stage I am!Originally Posted by mike84bigred
"Beauty is in the eye of the beerholder"
At The Back Of The Pack
Arm chair racerAt the back of the pack
What, preying? lolLOL! you're at the same stage I am!
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!)
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