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FJR Motorcycle Forums
Technical & Mechanical Problems
Replacing cam chain - remove ignition rotor?
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<blockquote data-quote="griff" data-source="post: 390764" data-attributes="member: 1658"><p>I think what they're getting at here (I don't have a manual or parts fiche) is the safest way to remove the bolt holding the ignition rotor to the crankshaft -- positively keeping the crankshaft from rotating while avoiding any possibility of damage. Anything with a hammer involved is to be avoided -- almost anywhere, but especially around the crankshaft (unless you want to straighten it -- but, that would presume it's already bent....). Better to hold it solidly somewhere (like alternator rotor) and loosen the bolt in question with a suitable wrench.</p><p></p><p>A parable:</p><p></p><p>Wally, "Can we take this rotor off?"</p><p></p><p>Other guy, "I don't have a puller."</p><p></p><p>Wally, "How 'bout we pry behind it and hit the end with a hammer?"</p><p></p><p>Other guy, "OK, I'll pry -- you hit."</p><p></p><p>Wally, "Sh%t! -- I didn't think the end of the crank would break-off like that...." <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /> </p><p></p><p>You may be right about the hammer (although with a hand impact driver, that's how you get the bolt loose), but I'm not concerned about rotating the crank - at least clockwise because I have the cams out and all I am doing is rotating the crank independent of the valves. I have to retime the valves anyhow. Anyhow, the bolt is off without really wacking the end of the crank too hard and that's the way it is going back on. It doesn't require a large torque to retighten - can't remember the exact amount right now.</p></blockquote><p></p>
[QUOTE="griff, post: 390764, member: 1658"] I think what they're getting at here (I don't have a manual or parts fiche) is the safest way to remove the bolt holding the ignition rotor to the crankshaft -- positively keeping the crankshaft from rotating while avoiding any possibility of damage. Anything with a hammer involved is to be avoided -- almost anywhere, but especially around the crankshaft (unless you want to straighten it -- but, that would presume it's already bent....). Better to hold it solidly somewhere (like alternator rotor) and loosen the bolt in question with a suitable wrench. A parable: Wally, "Can we take this rotor off?" Other guy, "I don't have a puller." Wally, "How 'bout we pry behind it and hit the end with a hammer?" Other guy, "OK, I'll pry -- you hit." Wally, "Sh%t! -- I didn't think the end of the crank would break-off like that...." :( You may be right about the hammer (although with a hand impact driver, that's how you get the bolt loose), but I'm not concerned about rotating the crank - at least clockwise because I have the cams out and all I am doing is rotating the crank independent of the valves. I have to retime the valves anyhow. Anyhow, the bolt is off without really wacking the end of the crank too hard and that's the way it is going back on. It doesn't require a large torque to retighten - can't remember the exact amount right now. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Replacing cam chain - remove ignition rotor?
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