blackbird-1100 Two Stroke Sniffer
Joined: 29 Oct 2011 Karma :
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Teflon-Mike tl;dr
Joined: 01 Jun 2010 Karma :
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Posted: 23:01 - 19 Feb 2012 Post subject: |
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It'll keep coming loose, becouse its not on tight enough....
Pull it off again. The end of the crank shaft ought to be tapered.
{ASSIDE: I had a lecturer at Uni who had done his Doctorate In engineering, studying the transmission load of taper joints compared to the fastening load; for the titanium inserts on prosthetic hips...
We were subjected to a year of lab-work that repeated his testing with different profile tapers and different atachement forces, measuring the 'release' strength... after three years researching that, no bludy woinder he was half crazed, thats all I can say! Other than}
Clean the taper on the shaft up with some oiled wet and dry sand-paper. Do likewise in the taper of the flywheel. This ought to get rid of any crap between the two that stops them mating well.
If you have it, you can 'lap' the two together; remove the woodruff key from the crank, and use some fine valve grinding past between teh shaft and flywheel, push the two together and work the flywheel back and forth on the crank taper to get a really 'good' matched fit between the two; pull apart, clean off the residues, refit the woodruff, then re-assemble.
Then the 'tip': after tightening yo the flywheel bolt, 'almost' to specced torque setting, slack off 1/4 turn and give the flywheel a few fairly 'firm' smacks with a rubber mallet to shove it onto the crank taper, then tighten the bolt up some more.
ONCE you have the bot torqued up to spec.... THEN remove the bolt, add screw-lock against vibration and do straight up to torque setting. ____________________ My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
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SnowyTupwood Borekit Bruiser
Joined: 13 Jan 2012 Karma :
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Posted: 17:47 - 20 Feb 2012 Post subject: |
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Good advice there
Do not, under any circumstances, be tempted to use loctite on the taper itself, you'll never get it off again
We had to cut one off a TZR250 recently that had been loctited, broke two pullers trying to get it off before using the air cutter ____________________ RD350LC/YPVS Race Bike and enough bits to start another one! - RD350YPVS Race Bike - TZR250 Race Bike - ZX9R - ZZR1400 project - DRZ400SM - RD400 - TS100 - TY250 - More info @ www.waveracing.co.uk or www.ypmrc.co.uk |
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