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Post by kingster on Apr 26, 2015 12:45:57 GMT -5
Ported and polished head non endrigo
aftermarket cdi and ignition coil combo
Pumper carburetor
Performance intake boot
clutch with red main spring
variator with 17 gram rollers
Starter motor (brand new still in box)
A lot more stock parts to.
300cc big bore kit
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Post by kingster on Apr 19, 2015 14:11:47 GMT -5
My problem is when i put the valve cover back on it makes a clacking noise. I thought it was my belt at first but when i take the valve cover off it doesnt make the noise anymore. The exhaust valve isnt opening and i dont have any compression. I dont have any bent valves, because if i was to take the valve cover off and turn the engine over i have compression. I dont know what the problem is, i have tried another valve cover that didnt help.
Could it be the camshaft?
Never had this problem.
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Post by kingster on Feb 18, 2015 8:11:46 GMT -5
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Post by kingster on Feb 18, 2015 8:09:00 GMT -5
Hey guys i have a spare cn250 clutch and variator. let me know if you need it 80$ plus shipping.
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Post by kingster on Dec 13, 2014 19:04:06 GMT -5
my cn250 makes this bang noise when cranking. i cant seem to understand what it is, it will eventually start but the the bang its making is stopping it. i was told that the fuel was pre igniting causing it to fire at the wrong time. the engine has 10:1 compression. My battery was also fully charged. the engine also has a bunch of mods. here is a link so you guys can hear how it sounds. any help will be highly appreciated. |
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Post by kingster on Oct 24, 2014 17:34:36 GMT -5
put the exhaust gasket in and im still having a loud backfire with a flame through the exhaust. I reset the valves on compression stroke. I also went back and relapped my valves again and still same thing.
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Post by kingster on Oct 23, 2014 20:50:15 GMT -5
no I don't have an gasket there. I just tightened the exhaust bolt.
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Post by kingster on Oct 23, 2014 19:58:55 GMT -5
hey guys just an update I installed my new valves(lapped them) and now I get backfire through the exhaust with a flame and the backfire is loud!!!!
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Post by kingster on Oct 20, 2014 10:31:03 GMT -5
yea both intake and exhaust valve were leaking. they are not bent, they just wont seat well after I relaped them. so I ordered a new pair hopefully they will seat.
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Post by kingster on Oct 19, 2014 11:49:27 GMT -5
thanks for your response, I knew my timing was correct. so do I need to relap the valves or replace them, as they shouldn't be bent. the engine has never jumped time.
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Post by kingster on Oct 19, 2014 9:47:46 GMT -5
i went back out and checked the timing again this morning and im still getting backfire, so i took the head off to check the valves. i poured gas through each port and the exhaust and intake valve is leaking gas. so if its leaking gas then i know its leaking air when the engine is trying to crank. could that be the problem?
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Post by kingster on Oct 18, 2014 21:34:41 GMT -5
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Post by kingster on Oct 18, 2014 20:50:46 GMT -5
hey guys my cn250 is backfiring through the carburetor. I have been readjusting my valves and timing all day. whats causing this? i set piston to tdc compression stroke, then adjust valves but im still getting backfire in the carb. i also have the camshaft lined up evenly with the head. The hole in the camshaft is on top with the A on the bottom.
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Post by kingster on Oct 9, 2014 19:40:59 GMT -5
i figured it out thanks. i had to flip the gear around that's on top of the shaft. thanks for your help
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Post by kingster on Oct 9, 2014 18:03:24 GMT -5
I have a cn250 engine that I need to switch the final drive shaft. is there anybody who has done this before. Last time i tried something was stopping me from putting the cover back on.
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