120R mileage and reliability
Road Master
Joined: Mar 2008
Posts: 1,209
Likes: 5
From: Michigan
700+ big block Chevy bikes?
Which bike would that be? The biggest bike I see on there is 445hp 376cuin engine (http://www.bosshoss.com/view_bike.asp?x=BHC3LS3SS), which is a bored out 350. The 350 isn't a big block motor, it's a small block motor (http://en.wikipedia.org/wiki/GM_Small-Block_engine).
Which bike would that be? The biggest bike I see on there is 445hp 376cuin engine (http://www.bosshoss.com/view_bike.asp?x=BHC3LS3SS), which is a bored out 350. The 350 isn't a big block motor, it's a small block motor (http://en.wikipedia.org/wiki/GM_Small-Block_engine).
Stage III
Joined: Jan 2011
Posts: 3
Likes: 0
From: SANFORD FL
Well i guess im the first one.mine has about 26 or 2700 miles on it.the flywheels shifted wiped out oil pump cyclinders and pistons.measured the run out and its 14 thousands.also scored the shaft.so i guess its time to build a bigger and badder motor
Road Warrior
Joined: Jun 2009
Posts: 1,514
Likes: 454
From: Canada
Sorry for the bad luck. So the million dollar question is what your enhancements to the motor will be...
Seasoned HDF Member
Joined: Dec 2005
Posts: 5,464
Likes: 624
Hello to all. I ran across this thread while searching for other 120R owners. I've got an 08 Fat Bob with a 120R (kit motor) and just hit 6,000 miles on the motor.
My motor recently started make some strange sound and when I took it to the dealer that did the motor the tech thought it might be a lifter issue. Well yesterday they started tearing into it and found that the bolt fastening the large chain sprocket had snapped off. The noise was from the head of the bolt banging around against the cover.
The bolt that I circled in read is what broke off.
Can anyone explain to me how or why this happened? Does anyone have an educated guess? I asked the tech at the dealer and he said he'd never seen anything like it. I'm not a gearhead at all. I have zilch in the way of mechanical aptitude. I am just wondering if it was something that I did that caused the problem or if there was something I could have done to prevent it from happening.
Any help or suggestions will be greatly appreciated.
My motor recently started make some strange sound and when I took it to the dealer that did the motor the tech thought it might be a lifter issue. Well yesterday they started tearing into it and found that the bolt fastening the large chain sprocket had snapped off. The noise was from the head of the bolt banging around against the cover.
The bolt that I circled in read is what broke off.
Can anyone explain to me how or why this happened? Does anyone have an educated guess? I asked the tech at the dealer and he said he'd never seen anything like it. I'm not a gearhead at all. I have zilch in the way of mechanical aptitude. I am just wondering if it was something that I did that caused the problem or if there was something I could have done to prevent it from happening.
Any help or suggestions will be greatly appreciated.
Zach
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
