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General Minitrail Talk
Tech Area
1974 CT70 Cam Timing and Ignition
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<blockquote data-quote="ctbale" data-source="post: 100358" data-attributes="member: 2418"><p>Your on the right tooth</p><p>that sound is normal ... well its normal when your chain is very loose. thats the noise of your cam when your rocker arm is just going over the high spot, then rotating your cam because your chain is has play. I can see the play on the vid (oh, awesome vids and pics!!) the chain will snap when you hear the noise.</p><p></p><p>This is how I adjust chain tension. you need a 12mm and a 14mm wrench, flat blade screw driver and I use a 1/4" extension.</p><p></p><p>get eng tdc comp stroke</p><p>take the "alt drain" plug out with the 14mm, dont loose the washer</p><p>use the flat blade and uncrew the spring retainer, a little oil and maybe 1 or 2 springs will fall on your rag I forgot to mention.</p><p>unscrew the 12mm lock nut about 2 full turns (or just take it off)</p><p>then unscrew the set screw 1 turn,</p><p>I like to see the tensioner rod come out on a "new to me" bike, so I can check for corrosion and verify the beveled side is facing me.</p><p>if it does not fall out, you and help it out by pushing on the chain near the cam, or by turning the engine over a little, that will get it moving.</p><p>check that the rubber "HEAD" is on your rod, and that its actually still rubber!</p><p>then, at tdc, and the bevel facing you, I use a 1/4" extension or a phillips screw driver and push that rod up with "pinky force" and set the set screw. thats the right tension. sometimes I just shove it hard, and release the pressure a bit., but you cant over toighten your chain if you use your pinky. unless your super strong.</p><p>put it all back together, you done with your chain.</p><p></p><p>I check the points with a meter (electrically) , thats the only way to get it spot on. The coil doesnt care about gap, dwell is a function of how new the points are. The coil only cares about when the points "crack" open, cuz thats when the all important spark occures</p></blockquote><p></p>
[QUOTE="ctbale, post: 100358, member: 2418"] Your on the right tooth that sound is normal ... well its normal when your chain is very loose. thats the noise of your cam when your rocker arm is just going over the high spot, then rotating your cam because your chain is has play. I can see the play on the vid (oh, awesome vids and pics!!) the chain will snap when you hear the noise. This is how I adjust chain tension. you need a 12mm and a 14mm wrench, flat blade screw driver and I use a 1/4" extension. get eng tdc comp stroke take the "alt drain" plug out with the 14mm, dont loose the washer use the flat blade and uncrew the spring retainer, a little oil and maybe 1 or 2 springs will fall on your rag I forgot to mention. unscrew the 12mm lock nut about 2 full turns (or just take it off) then unscrew the set screw 1 turn, I like to see the tensioner rod come out on a "new to me" bike, so I can check for corrosion and verify the beveled side is facing me. if it does not fall out, you and help it out by pushing on the chain near the cam, or by turning the engine over a little, that will get it moving. check that the rubber "HEAD" is on your rod, and that its actually still rubber! then, at tdc, and the bevel facing you, I use a 1/4" extension or a phillips screw driver and push that rod up with "pinky force" and set the set screw. thats the right tension. sometimes I just shove it hard, and release the pressure a bit., but you cant over toighten your chain if you use your pinky. unless your super strong. put it all back together, you done with your chain. I check the points with a meter (electrically) , thats the only way to get it spot on. The coil doesnt care about gap, dwell is a function of how new the points are. The coil only cares about when the points "crack" open, cuz thats when the all important spark occures [/QUOTE]
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1974 CT70 Cam Timing and Ignition
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