Broken Timing Chain

[jman7290]

Has anyone Broke a HD Timing Chain shortly after a fresh rebuild? What would cause this?

[jasonwayne222]

never heard of it but possibly too much tension on it.

[sc400ex_rider]

the t/chain tensioner might have failed there is a specific way to install them. you dont just bolt it back on. or the timing might not have been set right. how long did it run?

[jman7290]

This is on my buddies bike, we think that the tensioner has failed also but not for sure. His engine was rebuilt the same time as mine by the same person and I have had no problems. I am running 11:1 440 and he is running 12.5:1 416, he is also running a bigger cam than me. He got about 4 strong rides on it and with no warning the timing chain broke. We are also thinking maybe a defective chain.


05 440 11:1 Big Bore, Hot Cams stage 2, GT Thunder HD studs and HD timing chain, Ported & Polished, Trinity stage 4 full exhaust, Doug Eichner signature series 440 carb with billet spacer plate, AMR stage 3 CDI with Monster Coil, Uni Filter with Pro Design Billet intake adapter and aluminum air box with scoop, over sized aluminum oil tank wih air ports, Elka Elite front shocks with Full Flight +2 A-Arms, LoneStar +3 axcalaber axel with billet twin row bearing carrier, ITP Rims, DG Fat series swing arm skid, DG Race Peg nerf bars, DG V-Lite front bumper, OMF air scoops, Rox dash panel and hand gaurds, Precision steering stabilizer, Fasst Flex bars, ODI Grips.

[Honda#4]

Thats the first I've heard of a HD chain breaking.