Jackshaft update
- Thread starter Ddub
- Start date
Check it all one step at a time. Get the track off the ground, pull your belt and spin it to see if something is binding.
Check your clutch alignment and clearances.
Sent from my SM-G930W8 using Tapatalk
Check your clutch alignment and clearances.
Sent from my SM-G930W8 using Tapatalk
Yeah I got the track off the ground and it turns hard by grabbing the track but I can turn it fairly easy by turning the secondary.? I'm running a team tied secondary that I ran all last year. The only thing I changed this year is the new jackshaft with new gears. Well and a 940! Motor runs good and strong once I get moving but feels like major belt slip at engagement. The new chain I put in was very stiff!! Thought it would loosen up buy now. Like I said I'll pull the cover tonight.
Ya, it should roll easily enough that when your belt deflection is just right the track moves just a bit at idle.
Sent from my SM-G930W8 using Tapatalk
Sent from my SM-G930W8 using Tapatalk
I checked everything over and put in a manual chain adjuster. It's a little better but thinking it's the powervalves. I installed the bikeman 940 with a .250 valve shim but wasn't comfortable with valve to piston clearance so I made a couple .125 spacers. Would the valves being open so far at idle cause this issue? Seems low on power until 6000 rpm. It also will not back up worth a ****. Any ideas? I'll try removing the additional spacers and readjust the valves.
If you installed a 940 kit did you change some clutching too? What primary spring, weights, and brand of belt are you running?
I threw on a new Dayco belt I had won a couple years ago in raffle the last time I went out. It was doing exactly as you are describing. Gates and Cat belts I had on before with the same setup were fine. Deflection set just over squealing tight on all.
I threw on a new Dayco belt I had won a couple years ago in raffle the last time I went out. It was doing exactly as you are describing. Gates and Cat belts I had on before with the same setup were fine. Deflection set just over squealing tight on all.
If you remove the belt will the drive line rotate easy ?
I
Check your clutch alignment, you may need to adjust he shims behind the secondary.
Great point, I didn't check it. Changing the jackshaft probably changed the offset. Anyone know what the offset should be with a team tied?
I
Parts diagram doesn’t show any shims or orings.
pull the cover off the primary clutch with the belt off and see if the movable sheave sticks. It's very common for the movable sheave bushing to actually swell and get stick and even stuck. The bad news is when that happens you need to get a new clutch. I have scene this happen a lot.
You can upgrade to the newer style 2016-2017 team clutch too which seems to a very good clutch.
I would think the can restriction would be an issue on the top end, not so much at the bottom. What elevation are you trying to run at? I know Bikeman recommends their big bore can for lower elevation and stock bore can for high elevation. I run a Diamond-S on my 900 and I'm pretty sure Kevin at Hub's Performance was running them on the 940s too. Those are all being run at high elevation though. Still sounds like a clutching issue to me.
Similar threads
