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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Repairing crankcases and counter bore machining
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<blockquote data-quote="greg brillus" data-source="post: 35443" data-attributes="member: 597"><p>Hi there i have to agree with davidd on the fit of the liners into the crankcase, and see no reason for the liner to be a tight fit as there is little heat transfer down that end of the cylinders anyway. I have seen cases opened up to take the 600 kits and there seems to be very little room left at the inboard end of the cylinder hold down studs, but given the heads are only torqued to 30/32 ft/ lb's they should handle it ok. Be very hesitant to take others advice on pulling the heads to 45/50 ft/ lb's as some advise, as this will almost certainly distort the liners or worse. As another aside with regards to the 5 speed box, make sure that the bevel gear pt no:G39AS which needs refitting " Before" the cases are finally bolted together....has enough rotational travel to allow for the extra travel that the 5 speed camplate needs. The 5 speed camplate vs's the standard 4 speed plate has 6 detents around its circumference against the 4 speed's 5 detents including neutral of course, but the 5 speed plate has extra travel to pick up the extra gear....so to allow this to happen, the G39AS bevel gear needs extra travel to allow the camplate more rotation....there is a lot more info required to replace the 4 to a 5 speed, but hopefully this info will be supplied with your 5 speed kit....cheers for now....Greg.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 35443, member: 597"] Hi there i have to agree with davidd on the fit of the liners into the crankcase, and see no reason for the liner to be a tight fit as there is little heat transfer down that end of the cylinders anyway. I have seen cases opened up to take the 600 kits and there seems to be very little room left at the inboard end of the cylinder hold down studs, but given the heads are only torqued to 30/32 ft/ lb's they should handle it ok. Be very hesitant to take others advice on pulling the heads to 45/50 ft/ lb's as some advise, as this will almost certainly distort the liners or worse. As another aside with regards to the 5 speed box, make sure that the bevel gear pt no:G39AS which needs refitting " Before" the cases are finally bolted together....has enough rotational travel to allow for the extra travel that the 5 speed camplate needs. The 5 speed camplate vs's the standard 4 speed plate has 6 detents around its circumference against the 4 speed's 5 detents including neutral of course, but the 5 speed plate has extra travel to pick up the extra gear....so to allow this to happen, the G39AS bevel gear needs extra travel to allow the camplate more rotation....there is a lot more info required to replace the 4 to a 5 speed, but hopefully this info will be supplied with your 5 speed kit....cheers for now....Greg. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Repairing crankcases and counter bore machining
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