ES2 frame/gearbox

Fascinating John. That's exactly what my kickstart does. I assumed it was a new "multi-model" kickstart that simply didn't quite fit the ES2.Where would I get the width dimensions for the two boxes?I have noticed on the parts plate (JX part 65) that the bolt has a retained nut that could well fit between the rear plate of the p/chain cover and the cover itself with the loose nut tightening against the inside the that rear cover. Any views?CheersGeorge

Many thanks, Barry. The pic is looking back at the rear wheel so the bolt on the right appears to be between the gearbox and the primary chain inner cover, which is what I wondered. Good pic.CheersGeorge

Sorry Barry. I've looked a bit closer at the pic and can now see that what I thought was a bolt on the right is in fact part of the gearbox casting. So back to square one. At least it shows that the gearbox fits neatly between the frame tubes.George

Photo's come out a bit distorted, Barry, but it shows what I thought. The retained nut is on the outside of the frame and the loose nut (on that side) holds the p/chaincase against the retained nut. This means that to fit the bolt I will have to remove the primary chain, drive sprocket and clutch. Bummer!This could also be a reason for a dripping p/chaincase as the rear cover may well have distorted over the years.Many thanks for your input.George

I'm very grateful for your help, Barry. I didn't explain what I meant in an earlier email. I was trying to ask if the retained bolt sat between the inner p/chaincase cover and the frame. Your pic shows that it does so many thanks. Just got to find the correct sprocket extractor and clutch removal tool and I'll be sorted.CheersGeorge

Brilliant. Thanks John.I'll try and nip out to the garage this afternoon and check mine.I've seen an earlier thread about removing the clutch without the need of an extractor but it requires a specific bolt size which I probably don't have. Any hints on the best sprocket remover?George

Just been out to the garage John and the width of my gear box at the lower bolt is 3 3/16" .This compares favourably with yours (I was using a retractable steel tape!)The box is marked GB8 1591. Sounds like I too have a Dommie 77 gearbox. I'll have to washer it up by 3 to 5 /16ths. The new bolt has arrived albeit without the nut for the timing end and is long enough to do the job. When you say you've never had need of a clutch extractor is that 'cos you've never had to remove a clutch (hoho) or 'cos you have some other cunning method? Presumably running the ES2 engine with a 77 box is not s prob?George

Thanks John. Your help has been invaluable. I'll have ago at the clutch tomorrow and investigate a puller for the sprocket.Is there any way of dating my gearbox from the reference number on it in case I need spares? I'll also need model 77 spares list if I can find one - for the gearbox. I've already replaced the clutch pushrod thinking the box was an ES2 unitGeorge

Hi John - hope you're still reading the threads. Would it be possible to tell me the width of the upper casing of the GB8 box?

You've answered it John. Many thanks. Yes , it's the top fixing width I was after - to see if I needed to shim out any gaps between the gearbox and the mounting bracket.