buzzword
XS650 Addict
Check, I’m an idiot!
Just installed 750 kit, Shell #1 regrind, etc.
Did all the prework to degree the cam after installation. Adjusted cam chain tensioner correctly, set up zero lash on all 4 valves, etc. After checking this 3 times with the dial plunger 3 different places on the valve spring keeper, and my numbers didn’t change at all. Checked all valve events @ 0.050” on everything, and this is what I came up with:
R - IO 15* BT / IC 51* AB
R - EO 37* BB / EC 25* AT
L - IO 16* BT / IC 51* AB
L - EO 37* BB / EC 25* AT
Seems off - calcs out at 246/242 I/E duration, and intake centerline of 108* / exhaust centerline of 96*with 40* of overlap, which puts the overall lobe centerline @ 102* - I think that’s OK, but I’m starting to drive myself crazy here. Based on the search function here and elsewhere, these numbers for a Shell #1 should be 25/45/45/25. So, what gives? What’s the fix? I can’t play 4 dimensional chess this way, but I’m also guessing this is a simple fix overall, or maybe it’s fine?
If I do need to press and re-set the cam gear, or move it one tooth, what direction and how far?
Would appreciate any input or sage wisdom here. I’ve searched exhaustively on this and other forums and can’t find the dumbed down walter-proof idiot version. Maybe this is happening because it’s 12:21 AM and my kids drove me bananas all day, but I can’t wrap my head around this crap.
Just installed 750 kit, Shell #1 regrind, etc.
Did all the prework to degree the cam after installation. Adjusted cam chain tensioner correctly, set up zero lash on all 4 valves, etc. After checking this 3 times with the dial plunger 3 different places on the valve spring keeper, and my numbers didn’t change at all. Checked all valve events @ 0.050” on everything, and this is what I came up with:
R - IO 15* BT / IC 51* AB
R - EO 37* BB / EC 25* AT
L - IO 16* BT / IC 51* AB
L - EO 37* BB / EC 25* AT
Seems off - calcs out at 246/242 I/E duration, and intake centerline of 108* / exhaust centerline of 96*with 40* of overlap, which puts the overall lobe centerline @ 102* - I think that’s OK, but I’m starting to drive myself crazy here. Based on the search function here and elsewhere, these numbers for a Shell #1 should be 25/45/45/25. So, what gives? What’s the fix? I can’t play 4 dimensional chess this way, but I’m also guessing this is a simple fix overall, or maybe it’s fine?
If I do need to press and re-set the cam gear, or move it one tooth, what direction and how far?
Would appreciate any input or sage wisdom here. I’ve searched exhaustively on this and other forums and can’t find the dumbed down walter-proof idiot version. Maybe this is happening because it’s 12:21 AM and my kids drove me bananas all day, but I can’t wrap my head around this crap.