engine life
- Thread starter jeepenbob
- Start date
ZZ CHOP
Member
yea i have a friend that has a 88 year model EVO it's like a police bike. he put 150.000 miles on the original engine then bought a new long block from hd and has put over 100.000 miles on it, you would never know by looking at the bike itself that it would have that many miles on it so im sure it's all about the maintenance and how much ya twist that right hand
05chop
Well-Known Member
Warming up the evo is most important to me. If you don't you will have a leaker that will force you to overhaul it. Billet expansion rate! The other day i was at the Harley shop saw a guy that was pissed because his 96cu in bike overheats when in the parade mode.told me that it shuts down the rear Cly when it overheats. Waiting on Harley to get a fix or he is trading it off.
The other day i was at the Harley shop saw a guy that was pissed because his 96cu in bike overheats when in the parade mode.told me that it shuts down the rear Cly when it overheats. Waiting on Harley to get a fix or he is trading it off.
dogvet
Banned
Stroker motors typically have a shorter top end life due to accelerated piston speed which in turn increases piston ring / cylinder wear.
Maintenance will do more to prolong engine life than anything else. Oil change every couple thousand miles is way cheaper than engine overhauls...even top ends.
Low rpm operation is a big factor in engine durability as well. Parade duty (putting, profiling, whatever you want to call it) is bad because there is little airflow and below 2000 rpm there isn't alot of oil flow either. Rev em up a little to get some oil flowing. Without the airflow, oil is about the only thing moving heat away from the piston and cylinders.
Maintenance will do more to prolong engine life than anything else. Oil change every couple thousand miles is way cheaper than engine overhauls...even top ends.
Low rpm operation is a big factor in engine durability as well. Parade duty (putting, profiling, whatever you want to call it) is bad because there is little airflow and below 2000 rpm there isn't alot of oil flow either. Rev em up a little to get some oil flowing. Without the airflow, oil is about the only thing moving heat away from the piston and cylinders.
05chop
Well-Known Member
Dog vet you said Stroker motors typically have a shorter top end life due to accelerated piston speed which in turn increases piston ring / cylinder wear. This is very true with the billet motors we have. Distortion of the cylinders is something that we don't think about when warming the engine up. We have a steel motor mount clamped to a billet head. Steel and aluminum expand at a different rate. Very important to have motor mount torq to spec with the fiber washers in place.
K9Anniv
Well-Known Member
I still can't get my arms around that funky design set-up...guess it must be working for them (H-D), though.
Actually starting in 09 the shut down 1 cylinder became an automatic feature that you either enable or disable. The twist forward doesn't do that anymore. You can use it to kill the cruise but that's about it anymore.
jeffbradford
Member
thanks for the tip on killing cruise control.