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Post by carlitosgy6 on Feb 11, 2011 2:12:02 GMT -5
IM TRYING TO DO SOME MODS TO THE CN ,LETS SEE WHATS HAPPEN,I WILL TRY TO TOUCH THE 28 HP MARK FROM THE ROMANS,I PORTED THE HEAD CAREFULLY,POLISHED THE EXHAUST,SHAVED THE HEAD 2.1MM, REGRIND THE CAM,A GOOD CAM DEGREE,MRP MUFFLER,34MM TM MIKUNI,CUSTOM INTAKE,BUT NOW WITH THE STOCK 72 MM PISTON
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Post by Rebel on Feb 12, 2011 0:31:20 GMT -5
sounds like a screaming 250.
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bige
Non-Com
"PREFERRED VENDOR" LtCol Southern 2 & 4 wheeled mechanized LRRP's
Posts: 71
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Post by bige on Feb 13, 2011 7:15:10 GMT -5
we do alot of performance stuff with the 250's. we have two cam grinds that have worked well. they can make alot of power, add a good adjustable cdi and coil to go with the other mods.
we have found with the head and cam mods you can go with a little heavier roller
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Post by carlitosgy6 on Feb 13, 2011 22:10:37 GMT -5
i have the mrp adjustable cdi,tomorrow i will put together the engine,i notched the piston for valve clearance,this engine doesn't have any notches from factory,im going to make a good cam degree before starting,lets see what happens
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Post by carlitosgy6 on Feb 15, 2011 14:01:23 GMT -5
ITS ALIVE! i am doing a good break in to the cam,its sounds good!the carb seems to work better than a 30mm in idle,it sound like a 63mm stroker gy6 206cc on steroids
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Post by Rebel on Feb 15, 2011 15:36:52 GMT -5
so when does it go out for a test ride.
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Post by carlitosgy6 on Feb 15, 2011 19:40:10 GMT -5
its really good!it changed everything,the idle,the power,the sound,its not well tuned and i see 12 mph more,and its only in short trips,before it was 72 mph top speed and i have to make a top speed test after i change the variator to a bigger one ,because its revving up when its at high speed,just a tune up here and there ,maybe one or two weeks,its going to be fully tuned,the carb has a 200 main jet, and i think i have to change it
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Post by Rebel on Feb 15, 2011 19:57:27 GMT -5
It would be really good for you to post a lot of photos if you have them of this project.
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Post by carlitosgy6 on Feb 15, 2011 20:56:52 GMT -5
i have to remove the head to mod the ex valve guide because the valve seal is having conflicts with the retainer and its smoking a little bit so i can take pictures
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bige
Non-Com
"PREFERRED VENDOR" LtCol Southern 2 & 4 wheeled mechanized LRRP's
Posts: 71
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Post by bige on Feb 20, 2011 8:14:42 GMT -5
thats what we found when we first started with the cams. we have a small grind that does not interfear with the guides or the seals. I would recomend doing both guides. do you have performance valve springs as well?
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CAN YOU HELP ME OUT MAN,AS i LOST ME JOB DUE TO NOT BEING ABLE TO GET THERE?ANY INF