Primary Chain Tensioner adjustment on Harley Big Twin. Twin Cam & Evo.

[@TheMassdistortion]

so far the best example of how to adjust the primary chain. That cover off helped a ton. Thank you.

[@KnobleMoto]

Thanks. Glad it helped.

[@Peter-976]

You should have rotated your rear tire to find the tightest spot on your chain. Check in different spots

[@KnobleMoto]

It seemed to be consistent no mater where it was rotated to. That is a good point I should have added to the video though.

[@markuswells2770]

Great vid man! Very helpful! Simple and straight to the point! Perfect!

[@jamesconn7311]

Thanks for the video , why 24 t comp instead 25 t compensator?? any gains from that??

[@KnobleMoto]

Oh yes! It drop the final drive ratio from 3.10:1 to about 3.4:1. Huge difference on acceleration, and you don’t have to reprogram your Speedo. The stock Harley ratio is way too tall.

[@jamesconn7311]

@@KnobleMoto i own a 91 flhs 5 speed , which way would i need to go for taller gearing or would it make much difference Sir ?? Thanks

[@KnobleMoto]

@@jamesconn7311 if you want taller, as in lower rpms on the highway, you would want to go up in teeth on the front sprocket. Or a larger front pulley. If you want more acceleration, you would go to smaller numbers on the front sprocket or pulley.

[@jamesconn7311]

@@KnobleMoto Yes Sir , lower rpm 's what im after, Thank You !!

[@Crackrjack-dk8bm]

If you chain was too loose would it cause a shake at mid to high rpm?

[@KnobleMoto]

It’s possible, but I think it would make tons of noise too. Sounds like a miss fire, engine mounts, or something serious.

[@CPerreault]

When does the primary chain need to be changed? How can you tell?

[@KnobleMoto]

There is a wear spec in the service manual. It varies by model.

[@greenmarine5]

Logically when the chain is slightly loose and the tensioner is maxed out

[@jimsplace1957]

Would a primary chain thats too tight cause my bike to lose power?

[@KnobleMoto]

Not unless it was absurdly tight. But too tight will cause the transmission bearings to prematurely fail.