Whats the average miles I can expect out of a 117" to a 124" engine I worry about the short skirts.Stock cases.

 

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https://www.hdforums.com/forum/engin...35k-miles.html

I just tore my 120" down to check for wear. 45k miles on the bike, 35k miles on the build to 120".

 

depends on how radical you build it Dalton and phil ride their bikes all over the country. i tear mine down well my builder does it for me every yrjust to check and over 10,000 miles and over 350 dyno runs not a problem. this year tho i have had not as much chance to ride as i wish i could of.

 

we`ve done a fair amount of the 124"`s,never had a piston problem,skirts really aint that much shorter than SE 103" pistons,maybe about .100 if i remember right
kirby
facebook: kirby apathy

 

As already mentioned, the skirts are not really that short, and the OE cases are absolutely fine.
We build a good amount of 117", as well as 124", as both share 4 1/8" bores.
As long as they are maintained, they are quite a good engine.
Have them towing trailers, and also no problem with cross-country trips, loaded down.
Scott

 

I agree with Dalton, Goerge, Kirby, & Scott...

Build it "right", get (and keep) it properly tuned and take good care of it and it'll take good care of you.

Dunno about you... but I build these *****'s to RIDE!

 

16+k miles on my 117. Just tore it down for a cam swap and comp bump. All looked great in there. CCP and leakdown were the same as when i built it. Service regularly and ride with no worried. Phil touched a good point on the tune. Built it, tune it, ride it. in that order.

 

Did a 124" engine, stock cases, S&S cylinder kit and crank, R&R Stage 5 heads. The guy called me from Amorillo Texas in July with 75,000 miles on it, broke a valve spring and commented on how good (clean) the piston tops/combustion chamber looked. Rode East to coast then back home to Southern Cal. Put in a set of +.010" pistons at 85,000 miles and rode to Bonniville and set two land speed records.

 

Interesting.........

 

?????

Come on Scott... Don't hold back on us!

Just think, w/o that broken spring that bike may broken the sound barrier.