Comments on H-D Auto Primary Chain Tensioner Your Motorcycle Reviews Discuss Comments on H-D Auto Primary Chain Tensioner in the Harley Products & Services forums; I'd like to read any and all comments on this automatic primary chain tensioner. What did it do to shift sound, etc.? Is it an improvement and something you recommend? ...

[fxst-rider]

I'd like to read any and all comments on this automatic primary chain tensioner. What did it do to shift sound, etc.? Is it an improvement and something you recommend? Thanks.

[Gunnert]

I installed one on a 1999 Road King and it could not adjust it to fit. My "guess" is because I run a 3.37:1 primary ratio. It was too tight for my installation. I had to sell it on Ebay.

I Have used a Hayden's M-6 tensioner. Very pleased with it.

[hdnt1550]

I have the tensioner and have had no problems. One less thing to adjust.

[lowrider01]

i have had one in my lowrider for about 2yrs now,about 16000 miles ago,no problems.replaced the mainshaft seal a week ago ,had to take all the inner primary stuff out,looked really good,to me it's just one more thing that i don't have to mess with.