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Can anyone guess what happened.
Topic Started: May 16 2016, 08:50 AM (1,739 Views)
Oddsie
Knight
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I am new to ccm but not to bikes or engines. But seen this bike advertised locally and bought it in December. I rode it home at the time (24miles) and parked it up as my race bike was taking up my time. 1985 gsxr turbo :-) . Saturday past my wife and I decided to go for a run so I dragged it out and got it going. Made it half way down my street and BANG screech........ engine won't turn over and starter won't engage.. after stripping it I know what happened but can anyone guess?? :what:
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Oddsie
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stevo604
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God
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looks to me your engine has went bang big time with broken crank cases.

if I remember well was that the one on gumtree with the gold wheels was interested in buying it myself at the time
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vinny900
Marquess
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snapped conrod ? Or was it an alien trying to escape out of your 604's belly. Looks pretty terminal
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Oddsie
Knight
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:chin: Aye it was on Gumtree early December... and yes excel rims and talon hubs scorpion exhaust etc... was a nice looking bike. You are both on the right lines. The conrod is ok but something did try and make its way out? Any other guesses? Before the pictures get grafic and gorey?
Edited by Oddsie, May 16 2016, 11:24 AM.
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stevo604
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Oddsie
May 16 2016, 11:23 AM
:chin: Aye it was on Gumtree early December... and yes excel rims and talon hubs scorpion exhaust etc... was a nice looking bike. You are both on the right lines. The conrod is ok but something did try and make its way out? Any other guesses? Before the pictures get grafic and gorey?
looks to me like the balancer shaft has tried to escape I have two 636 rotax at the moment and a spare engine in parts if you need anything :chin:


or would you be interested in selling no harm in asking
Edited by stevo604, May 16 2016, 11:44 AM.
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RB636
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Potato Farmer
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Well fuck me! Never seen one go bang like that! did the crank break?
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Ant P
Viscount
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Wow! That must have made some noise! Have you removed it and seen what damage its done other than to the cases?
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Oddsie
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The worse is yet to come.......
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Oddsie
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To cut a long story short the bike was a time bomb. And I'm very lucky all this happened at slow speed and not on the motorway on my way home at 70 mph. ....


Some ham fisted home tinkerer had not built it correctly after working at the sprag clutch.

The woodruff key was missing from the balance shaft drive gear. And the whole lot was held by the nut on the end. Eventually the nut loosened and came off. Allowing the gear to spin on the shaft and the crank to hit the balance weight. The rest is just a mess :-(


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Oddsie
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Oddsie
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Oddsie
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Oddsie
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Roadster604
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Holy crap!!!!!!!!!!! :chin:
keep the faith
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Lardmarc
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Jester
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I feel for you matey.

Some people shouldn't be allowed to own Tools .
Just a flunky along for the ride.
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Oddsie
Knight
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:tomatoes: That was my thought aswell. Followed my ooh shit that looks expensive
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Oddsie
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Please excuse the quality of this last picture this was it in December

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Monty
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Charlie Big Banana's
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bet there was chisel marks on the nut as well., megga bummer
If it aint sharp I can play with it
My Utube Channel, lots of bike vids here. Subscribe if you likehttp://www.youtube.com/user/choppermark?feature=watch

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stevo604
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man never seen one as bad and I bet you know who done the work on it
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