where to buy special style bolts?

[tahrey]

Riiight
Taking engine off CG frame, the final rear mount bolt was a complete fecker. Managed to destroy a 12mm socket and a couple adaptors for my torque wrench and breaker bars before it was persuaded to come free with a lot of WD40, application of a 1600w heat gun for 10+ minutes, and a lot of hammering and battering.

Suffice to say it's all chewed up and nut doesn't even really go on any more. I need a new one...

But where the bloody hell do you get them? Anywhere I've tried to look this style up I've got nothing.

M6, 12mm hex-head bolt, 110~120mm long, only has thread on the last 10~15mm or so, fairly close pitch thread (not a coach bolt), and it seems to flare out to about M8 near the head for a similar length as the thread. Plus an M6, 12mm nut to go with.

About to check with my friendly neighbourhood bike dealer/service place and see if they happen to have any generic ones in, I'm hoping it's not Honda stealership only though, as it'll really hold me up getting anything else done. I'm already about to be about twenty quid in the hole for replacement and/or upgraded tooling, because some of the bits that got broken are going to be quite essential for the next stages, never mind putting the bike back together.

Me & mum's partner had a good pore through the Machine Mart, Toolstation, Screwfix etc catalogues he had scattered about and couldn't find anything suitable - any bolt long enough was then too thick. Halfords look pretty useless on this front as well.

Ta for any help

[Pete.]

A 12mm head bolt would be an M8 thread, not M6. Can you check that before continuing? Measure across the thread tops.

Or post a photo of the knackered bolt (so we can all have a laff)
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Joenitro]

Send your mrs into a bike breakers for one. If you went they probably wouldn't be arsed looking for you but will do anything for a woman as they don't see many. I've used this method many times and it works a treat

[Pete.]

I just checked my stock and the longest M8 I have is 93mm.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[WillOdling]

Is it this?





https://www.ebay.co.uk/itm/Honda-CG-125-1984-Rear-Engine-Mounting-Bolt-breaking-for-spares-/251161514193?pt=UK_Motorcycle_Parts&hash=item3a7a6490d1&_uhb=1
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2002 GSX R600

[_Iain_]

Go to honda dealership, ask for bolt. They'll say they havent got it, but will have it in 24hrs. You'll probbably pay about £3.

Have done this many times with YBR bolts & GS bolts.
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Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[Raffles]

I've a suitable bolt. PM your details and I'll send it to you tomorrow.
____________________
A good loser will always be a loser.

[kramdra]

I can confirm the bolt is not really nessasary... I dont know how many of the 49k miles my CG had been without that bolt.

Original was snapped thread on clutch side. Bolt was held captive by sprocket cover, rattled a bit..

Note clutch side, the exhaust/rear brake/frame bits may prevent you getting *anything* on, socket or spanner, so you cant actually tighten it.

Was over a year ago, and a 1993 model, so you may have more luck with yours.

[Pete.]

If you can fit it you should fit it. Sure, the engine won't fall out for lack of a single bolt (I've seen several spine frame bikes with the top triangle engine mount totally missing) but it will cause flex in the frame and extra vibration (even if you can't feel it) which will be bad for the engine and other parts of the bike, like the exhaust.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[tahrey]

Thanks chaps. I was hoping there was somewhere I could stop in at on the way home, so I could get the job sorted quicker, but it looks like this stuff is rather more specialist than the plain bolts I got hold of to hold the ignition coils onto my old Megane... (the silly sods used spline-heads originally so yeah, chewed to hell getting them out)

I figure I may as well just go order from the dealer at this point, despite them not being my most favourite people owing to their habit of locking up and turning the lights off at about 5.30 despite their opening hours reading as "until 5.45". Anything that could be posted or got off ebay will take even longer to turn up.

And in any case, thanks to having to go replace the broken tools and do a few other errands last night, I didn't then have the time to head across town and attack the business of removing the head and barrel from the old bottom end, so I'm already held up. I guess I won't have it back running on the road before the end of the week at this rate now

For what it's worth, my assumptions of what it is come from direct measurements with a brand-new metal ruler.

Used a 12mm spanner and socket to get it off;
the total length of the thing from top of the hex head to the end of the thread is 115mm;
the thread diameter is exactly 6mm;
there's roughly 13mm (I guess actually a half inch?) of thread at the bottom - of which only half is actually used (the rest is rusted to hell);
and I didn't measure the width or length of the flared bit because I only noticed quite a bit later. Didn't measure the thread pitch either because no bugger ever specifies it and I was going to have to check it visually anyhow.

At a guess, it started life as a 120mm, M8 bolt, but was then machined to be thinner in the middle and at the business end, and had a half centimetre shaved off the total length for good measure?

[Pete.]

Very strange. I don't believe I've ever seen a M6 bolt with a 12mm hex head.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Raffles]

[tahrey]

Probably why I need to get it direct from the OEM then!

[Pete.]

I'd still lke to see a picture of the offending item.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[stavros]

try this lot for pictures and dimensions of honda stuff

https://www.cmsnl.com/search.php?s_keyword=bolt&Button_Insert=search&partblk_category=&partblk_block=&part_hotitem=&model_id=2601&part_category=Frame

ignore the euro price, there is one with pounds but can't find that at the moment.

stephen
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VFR 750 in red ( the fastest colour) Not any more. TT600 is cool

[tahrey]

I think I actually still have it in my work bag, so I might actually get a pic in a bit... with a second ruler for comparison. Unfortunately the day's getting rather busy so I can't guarantee the opportunity for it.

I'm just going to order from the stealer now I think, I didn't do it yesterday because I half-remembered seeing some kind of through-bolt on the new block which might have been salvageable.

Unfortunately it looks like there's a lot of drilling and/or dremel-ing in my immediate future (and maybe some serious blowtorching) because not only is the nut absolutely seized to that bolt to the point that even proper hex sockets (on a brand new near-as-dammit-solid T-bar plus hard rubber mallet acting as an impact driver, no less) were rounding off both ends, but there's the stub of another presumably very bent bolt wedged in another one of the mount holes - badly enough that hammering on it from inside (with a drift) or out has failed to shift it a millimetre. Even soaked them in WD40 and gave a good blast with a heat gun but got nowhere. Hopefully the apparent softness of the metal means they won't be too hard to chop up and eke out.

[tahrey]

[kestrel]

[Pete.]

[Raffles]

Decyphering the original post, I concluded that the bolt required would be a M8 x120. I have a number of these bolts and offered to send one to the OP. He didn't respond to my offer.
____________________
A good loser will always be a loser.

[tahrey]