Slotting cam wheels

[Crofty]

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

[z1bman]

defo machine shop

[Al]

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

[Crofty]

Thanks guys, I will have a word with them.

[zed1015]

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.

[Crofty]

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.

[69chris]

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

[Crofty]

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

[Crofty]

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.

[nanno]

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

[Crofty]

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.

[sanderz]

Excellent work Crofty

Goes to show what a differance the 'stack up' of tolerances (+/-) can add up to.

Keep us posted as it progresses.