chain through engine case

[bullant47]

hey guys,

a mate of mine had his chain come off and go through his engine case.

its a 2001cr 250.

can anyone tell me if a 2002 left side case will fit.

thanks guys

[sonobob]

Afraid not. Different part no's. altogether. 2002 was the first year for the case-reeds. Was your mate not running his case-saver, or did the chain eat right through it?

[GOTWHEELS]

If he just knocked A hole in case, maybe JB weld.

[sonobob]

If he just knocked A hole in case, maybe JB weld.

I've heard many good stories of JB weld repairs to engine cases. Can't hurt to try, huh?

[cuddies say YEE 925]

Was he not using his case savers?

[shovelhead]

HOw about filling in the hole with one of those alum. rod filllers. JB weld might also work

[234gearwheelie]

My current 2000 cr250 had a holed case were the chain punched it, i bought the bike cheap and took the case after removing all bearings and seals to a wled shop were they charged me £15 to ally weld it, about $27. The case to buy from honda was over £300????

[Faded]

Was he not using his case savers?

If your chain breaks, de-rails, etc. your stock 'case saver' isn't going to save your case; not even close.

[sonobob]

If your chain breaks, de-rails, etc. your stock 'case saver' isn't going to save your case; not even close.

Granted, that little piece of cast aluminum typically isn't going to withstand much from a steel chain at that velocity. The one time I've had a chain break was on my old RM125, pinned in 3rd, maybe 4th gear...the stocker saved it that time. I realize that's gonna be the exception rather than the norm.

I wonder how the billet pieces hold up...

[N4TRBL]

That happened to my CR 500 back in the day and my mechanic was able to Heli-Arc weld it and even ran a few extra beads to protect from that happening again.

[sonobob]

Doesn't really make sense that the case savers are even installed. Other than for marketing and illusions of false security, I suppose. But having some time to think about it, it probably wouldn't help much, if at all; to even have one made of steel in there. The weak link is still gonna be the bolt threads in the aluminum engine case anyway...

Hmmm....I feel another FrankenFabrication seizure coming on!

[Faded]

The weak link is still gonna be the bolt threads in the aluminum engine case anyway...

Exactly. I've wondered how the billet pieces hold up as well; I have a Fastway on my 450R, but I don't plan on 'testing' it out either.

[bullant47]

sorry guys, ive been away.

yeah the chain went into the saver so hard it ripped a massive

hole in the case where the saver bolts in. the saver is still sweet.

lesson learnt the hard way by my mate! never ride with a damaged

chain gide.