Slotting cam wheels
Posted: Wed Aug 03, 2011 9:24 pm
I will need my cam wheels slotting for my Z810 engine, is this a machine shop job or is there a reliable way to do it myself? Crofty
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Slotting cam wheels
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Posted: Wed Aug 03, 2011 9:44 pm
defo machine shop
Posted: Wed Aug 03, 2011 9:58 pm
Debbens were doing them on exchange for 1000 and 1100 for about £45 could be worth a call.
Might also mention that this process had removed all the timing and identification marks from the ones i saw!!
AL
Might also mention that this process had removed all the timing and identification marks from the ones i saw!!
AL
Posted: Thu Aug 04, 2011 7:34 am
Thanks guys, I will have a word with them.
Posted: Thu Aug 04, 2011 9:07 am
I slot my own with a small round file.
The cam sprocket metal is soft.
Put the sprocket on the cam without any bolts and rotate the sprocket on its stub whilst scribing through the bolt holes.
That way you get the correct arc for filing the slot.
You don't need to take much off, Just enough to move the sprocket in the range of one tooth.
The cam sprocket metal is soft.
Put the sprocket on the cam without any bolts and rotate the sprocket on its stub whilst scribing through the bolt holes.
That way you get the correct arc for filing the slot.
You don't need to take much off, Just enough to move the sprocket in the range of one tooth.
Posted: Thu Aug 04, 2011 9:48 am
I have three sets of cam gears, so will try the filing option on a set for starters. The GPZ wheels have a recess for the bolt head, which will be in the way, so might need it milling around that area, we'll see.
Posted: Thu Aug 04, 2011 10:02 am
zed1015 wrote:I slot my own with a small round file.
The cam sprocket metal is soft.
Put the sprocket on the cam without any bolts and rotate the sprocket on its stub whilst scribing through the bolt holes.
That way you get the correct arc for filing the slot.
You don't need to take much off, Just enough to move the sprocket in the range of one tooth.
did the same thing years ago, i used a chainsaw sharpening file which was spot on
Posted: Thu Aug 04, 2011 10:53 am
Ok, just had a go at filing it and Rob was right, the gears are pretty easy to file. Filed one hole out in around 15 mins. Gear rotates enough either way to get nearly one tooth either way. Can always file a bit more if needed when the time comes.
I will need to have some metal machined off from around the bolt head recess to allow bolt head to sit flat against the wheel though.
Vid of one slot done
and pic of both wheels done
I will need to have some metal machined off from around the bolt head recess to allow bolt head to sit flat against the wheel though.
Vid of one slot done
and pic of both wheels done
Posted: Thu Aug 04, 2011 2:24 pm
Out of curiosity I overlaid the two cam wheels together with the holes and marks aligned and they were approx a third of a tooth out with each other.
Posted: Fri Aug 05, 2011 6:32 am
Crofty wrote:Out of curiosity I overlaid the two cam wheels together with the holes and marks aligned and they were approx a third of a tooth out with each other.
I would say, that is a good reason, for slotting them anyway.
Cheers,
Greg
Posted: Fri Aug 05, 2011 8:07 am
Too true, which as I have said before. Two same model bikes come out of showroom and one goes really well and the other is'nt quite as quick.
Posted: Fri Aug 05, 2011 8:36 am
Excellent work Crofty 
Goes to show what a differance the 'stack up' of tolerances (+/-) can add up to.
Keep us posted as it progresses.
Goes to show what a differance the 'stack up' of tolerances (+/-) can add up to.
Keep us posted as it progresses.