Royal Enfield Bullet crank, previously rebuilt elsewhere, has terrible runout.
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- Опубліковано 5 вер 2024
- I knew this crank had been rebuilt at sometime, because there was a red thread locking compound on the threads of the crankpin nuts' locking screws, which was not factory. This crank is to be lightened, rebalanced and rebuilt to 'Asbo' specs, with a ateel conrod with roller big end.
Enjoy these crankshaft escapades...G, Angelsey.
sound quality much better. thanks chap
Thanks, but I honestly don't know how or why that should be!
It's the new long stroke engine with added 'character'.
Watching the gap change between the flywheels was pretty stand-out. In my experience, I used a wedge driven into the closing side of the gap to spring it into shape. Bultaco did that at the rebuild shop in Schenectady with a "T" handle tool just for that, just twisted it like a cam However, that was done after the cases were pulled together, they had very tight main bearing clearances for the bearings.
I wondered how the big-end was made; I'd want the roller rod change for my own if I had one.
Thanks Paul.
G'day Paul, interesting how the shafts and flywheels loose adjustment, is that down to wear, miss use or something else??, Anyway it's in the right place to be repaired, cheers mate, Neil 🤠.
Hi Neil, this crank has been rebuilt at some time and not trued up very well. I doubt it became like that during use.
@@paulhenshaw4514 hi Paul thanks for the reply mate, your the best.
Please explain ASBRO. Bro ?
Where do we find specs on runout Paul. Going to attempt a RE Mk1 Interceptor motor build but don’t know where to find these specs. Same question for oil gap. Thanks 🙏🏻
'Asbo' is a name I gave to my tuned RE Bullets. ua-cam.com/video/_fmtoX_Jj54/v-deo.html
I think a manual, which will be available from Hitchcocks will contain all the info you need for your Interceptor.
I have a question if you can help me out that would be great . Does the valve ,valve guides and rocker arm assembly are the same for both 500cc and 350cc cast iron royal enfield Indian bullet.
The rockers and guides are interchangable, but not the valves.
Thank you
Can't be an ASBO.
Agree, only a complete signed off road tested example should qualify.
I had to open the engine on my bullet 500 because the oil is not passing out of the floating bush good enough to catch up with the sump pump. But the connecting rod looks fine with out any play and of course there is a big run out at the clutch side. Can you pls tell me what you think would be the problem is the oil hole might get block or the floating bush holes might get block. Pls let me know
Oil is pumped into the engine more slowly than it can be pumped out, that is how they are.
So if it’s not pumping enough to the crank case does it creates a situation where the rocker oil flow is interrupted
The feed to the rockers will be intermittent, that is normal.
Thanks a lot for your valuable information.
Makes you wonder what the rest of the engine is like.
It takes nerves of steel to go into a "standard Enfield "
I can understand replacing the rod for a steel one but why change to a roller big end?
My experiences with these engines in the 70s and 80s roller big ends especially the caged Alpha ones had a very short lifespan the floating bushes on the other hand 50,000 miles wasn't unusual.
I have no problem or issues with the plain big ends - except for some recently made ones - as for the roller big ends, it is down to what the customer wants. Lots of my Asbo engines have the alloy rods and plain big ends inside them.
I agree with you ! but see Pauls comment below, Ive got to do my Enfield soon ( not my daily driver , another one ) and Im in a quandry .. If I can get old new stock .....
My friends Indian Bullet had 13 thou runout as standard from the factory
Wow!
The new Big twin Harley-Davidson twin Cam and Milwaukee 8 considered up to 12000 run out acceptable.
I am not too surprised at that!
The bearings will not last long.