[wokka]

Got a mate of mine with a C5 and a cozy sidecar,
It's had a hard life even though it's only got 10,000km's on it, being used to carry 6 guys camping gear on a 1,000km ride, long sand road rides, and 70km each way every day to work at 115km/h.

Long story short, the motor finally gave up last night, the bottom end is ok, but the piston and sleeve are stuffed so...

If you could start from scratch, what would you do?

535 kit?
keep it 500 but with an AVL piston?
keep it stock?

[GlennF]

To be honest if the stock C5 only survives 10,000 km in that environment its unlikely a hotted up one will last any better.

I would be getting a Ural.

[Ducati Scotty]

500 with the AVL piston.  Also, one tooth smaller front gear or a few teeth larger rear for more pulling power, high performance front brake pads, steel braided front brake line.

The AVL is a drop in and inexpensive.  No machining, jetting, EFI changes, etc.  Drop it in and go.  The other stuff just makes it go and stop better with the added weight of the car.  Stiffer front springs would be a good idea too, something like 0.90 or 0.95.

If you're going with a 535 that's going to be enough hassle to get tuned anyway.  Don't add that to a sidecar, build a little two wheel hot rod.

Scott

[wokka]

Well.... 

I have never heard of this before, but the crank bolt had worked itself loose, and jammed itself between the primary chain and the case.

Bottom end is fine, top end is carbonated on the piston, but showing burns on the valves and the whole motor stinks of burnt oil



Anyone ever had this happen or heard of it happen?

[Maturin]

I´d follow Scotts advice and simply put a new piston in. Maybe it´s a good idea to replace the valves aswell, as the piston obviously died the heat exitus and the valves certainly got their share of degrees, too.
Afterwards mount an oil cooler to avoid futther trouble - or just drive a little more relaxed 
Best regards & happy tinkering

[Ducati Scotty]

+1.  At the least I'd get new valves and lap them in, maybe even regrind the seats if they're badly burned.   Check the cleareance on the valve guides too.

Never heard of that particular bolt coming loose but does anything coming loose on an Enfield surprise you?

Do they have an accessory oil cooler for the UCE bikes?  I know it was easy to plumb one into the older bikes with the external lines.  Either way, an oil cooler for any air/oil cooled bike is always a good idea, especially under the extra load of a sidecar.  Ace, if you're listening this would be a great UCE accessory that hopefully wouldn't require the kind of engineering time that goes into a new cam or other engine internal.

Scott

[BRADEY]

Well.... 

I have never heard of this before, but the crank bolt had worked itself loose, and jammed itself between the primary chain and the case.

Bottom end is fine, top end is carbonated on the piston, but showing burns on the valves and the whole motor stinks of burnt oil



Anyone ever had this happen or heard of it happen?

Damn ! can you suggest from where this bolt came from ??























 emule, pandora,  limewire

[Fox]

emule, pandora,  limewire

Dude you've got some spyware on your computer inserting links to some crap. I'd recommend clearing that crap off, changing your passwords and keeping a close eye for unauthorized credit activity.

Also that picture is absurd. I can't think of a single reason why that condition should ever be possible. Someone needs to get acquainted with the use of a torque wrench.

[Arizoni]

The picture looks like it is of the same bike that was posted in India on the BHP site.

On that bike the bolt head broke the left side cover casting at the same boss that is shown in the picture.

According to that post, the bolt shown is the one that holds the crankshaft output sprocket to the left end of the crankshaft.

Supposedly, RE acknowledged the problem and said the current design had threads which were the wrong hand and they were going to reverse the threads to correct the problem in the future.
I don't know if this is true or not.  I am just relating what I read about it.

[wokka]

The picture looks like it is of the same bike that was posted in India on the BHP site.

On that bike the bolt head broke the left side cover casting at the same boss that is shown in the picture.

According to that post, the bolt shown is the one that holds the crankshaft output sprocket to the left end of the crankshaft.

Supposedly, RE acknowledged the problem and said the current design had threads which were the wrong hand and they were going to reverse the threads to correct the problem in the future.
I don't know if this is true or not.  I am just relating what I read about it.

I wish it was another bike, I wouldn't feel like such a bastard about leaving my mate with out his bike for 3 weeks while the parts come from India.

And yeah it's from the crank output socket

[Ducati Scotty]

Aside from the obvious crank bolt repair, what's your final decision on what to do about the piston, etc.?

Scott

[singhg5]

Arizoni is referring to similar incident on another bike in India - here is the link to that discussion on BHP form -

http://www.team-bhp.com/forum/motorbikes/112147-re-classic-500-screw-ripped-my-engine-case.html

[GlennF]

Seems like Royal Enfield agreed to fix the one on the BHP forum even though warranty had expired.

Perhaps the owner of this other failed bike should approach them as well.

[wokka]

Aside from the obvious crank bolt repair, what's your final decision on what to do about the piston, etc.?

Scott

an AVL piston is on order, then fust a cleanup of the valves,

Seems like Royal Enfield agreed to fix the one on the BHP forum even though warranty had expired.

Perhaps the owner of this other failed bike should approach them as well.

It might be a little more difficult here, there is a political battle going on here with the dealer and a bunch of riders. all servicing on our bikes (including mine and another still in warranty) is done by another garage.

[Ducati Scotty]

I hope the other problems with the engine and the dealers sort out.  Looking forward to hearing about how the AVL piston performs.

Scott