b40rt

I have an air cooled climber motor, but found the gearing very high, even with 10t gear box sprocket, and 54 tooth rear. Eventually I will change the crankshaft pinion and clutch basket for earlier ones. Have fun ! 2 day trial at D'All is very good I'm told, are you riding this year.

Welcome, you havn't kept the climber clutch casing ?

I was going to suggest j b weld, trouble is if its not successful if make welding more difficult.

@breagh Alan can you recommend anyone ? I'm sure the plate would be ok being welded.

A competent welder should be able to repair that easily, there's no real stress on it so doesn't have to be super strong. Possible cause being the stator was loose for some time. Where are you so people can recommend a welder.

I thought I read somewhere they modified the clutch to reduce engine braking ?

Apparently these ratios are only ok if you mix fuel in 6L containers ?

Look like "leaf" springs to me ...

Yes, m8 for bottom shock mounts on twin shocks. No real stress on these, button tops don't tend to get snagged on passing scenery ?

Excellent work, (thought you had been abducted !) exhaust as shown might lack bottom end power ?

Appreciate your input, I've yet to find any "partial threaded" I'm assuming its because the relatively small allen key size isn't sufficient for proportionate torque ?

Thanks triailrfun, I'll try both.

Thanks konrad, common here to if you want set screws, but not as bolts.

Minor hijack, any one found a source for Allan button top bolts ?

Don't think it will be the coil, they tend to work or not work. But worth eliminating if you can borrow one.

Sounds electrical, failing ignitions start to break down as temperature rises.

@Andy

I thought you ran everything on red diesel ??

Modern oil is probably better in old air cooled motors, at least they get hot ! Speaking to a friend who's an excellent mechanic, his only comment was not to use fully synthetic engine oil in NEW engines until the rings have a chance to bed in. Excessive oil consumption due to bore becoming glazed was a problem with Vauxhall's for a time.

I doubted his legitimacy because he obviously can't back his statement with any facts. Quoting 2 stroke ratios for 6 litre containers, seems as pointless as your comments !

Thanks otf, so depending where you compete will make a difference, 4 times round a field, or more traditional trials with long climbs that get some heat into the engine.

Plastic tanks definitely are semi porous, so I can see there being some validity to this. Ambient conditions will obviously be a factor.

Why only semisynthetic ?

Have you anything relevant to the topic to add ? ( I think your last line should read "just because it doesn't make sense, it doesn't make sense )