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C15 Gearbox Problem ?

Featured Replies

Riding round the garden today on the C15 and had to reverse

the bike in gear with the clutch pulled in and it wouldn't go

backwards unless it was in neutral.The clutch is fine and clears

all the gears,is this normal????.I have never noticed this before

(recently changed gearbox camplate with upgraded part,gear

change is fine),could it be something to do with the kickstart/pawl

as it's action now seems further forward than it used to be.

cheers the noo Brian

  • Author

Ross,no problem in neutral.It only happens when

in gear and trying to manoeuvre the bike backwards

with the clutch in.The only thing I thought it might be

is the kick start as its on the end of the transmission.

I'll strip the outer casing off tomorrow and have a look.

Are you going to Drumcarrow on Sunday?

cheers the noo Brian

Edited by broony

I had a similar problem that turned out to be that the rear wheel was out of line and the chain was trying to ride over the rear sprocket, stopping the wheel. I know you said it only happens in gear but worth a look ( it only happened when going backwards)

Edited by davetom

  • Author

Will have a look at that first.

cheers the noo Brian

Good suggestion from davetom, that also happened to me, chain was on top of sprocket making it really tight.

Now run with the snail cams 1 out from side to side.

Probably going to Bedlington trial on Sunday Brian.

  • Author

Up the shed tonight,checked the gearbox and shift all seems ok.

Can anyone with a C15(dizzy motor) see if they can have the bike

in gear(1st will do) work the clutch and see if the bike can be

pushed backwards in gear with the clutch in(freewheel).Mines locks up

trying to do this(never noticed this before and not good if stuck

on a section).They may all do this ??????

cheers the noo Brian

Does it still lock up if the rear wheel is off the floor? Mine only locked up if I was sat on it ( ie in a trial)

  • Author

Hi Davetom with the bike on the paddock stand and wheel in the air

it locks up,I can turn the wheel forwards but not backwards,think

it has something to do with the kickstart pawl as its on the end of

1st gear.

cheers the noo Brian

  • Author

Problem solved ,found out what was causing the problem.

The kickstart return spring retaining screw holds a stop

plate on the inner cover never noticed it had fell out.

the stop plate was lying at the back of the gearbox.The

screw was never tight and I thought it was stripped in

the cover.Lesson learned .

cheers the noo Brian

Edited by broony

Glad you've solved it, something else to look out for..

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