Urgent G2 gearbox shaft leak help for Newby

Information relating to the Matchless G2 or AJS Model 14 250cc Lightweight
Member
User avatar
Posts: 2278
Joined: Wed Dec 14, 2011 1:02 am
Location: ESSEX UK

Re: Urgent G2 gearbox shaft leak help for Newby

Postby Ozmadman » Sat Aug 12, 2017 1:19 am

BigJock wrote:BTW lost the clutch because oil level had dropped and the pull lever inside rh cover had locked up.

Don't let the oil level drop keep it right up to the filler/clutch arm plate otherwise you will knacker the box as all the gear are in the top section of the box
Paul
1960 Model 8
1974 Yamaha RD250B US Model 6 speed

Posts: 14
Joined: Thu Aug 10, 2017 1:16 pm
Location: Jockland

Re: Urgent G2 gearbox shaft leak help for Newby

Postby BigJock » Sat Aug 12, 2017 2:05 pm

Got it back together - thread n superglue. Worked in all 4 gears but rattling in neutral then bang...kickstart jumps rattling like blazes and no gears - anyone????

Member
User avatar
Posts: 495
Joined: Sat Jun 20, 2015 8:38 am
Location: Chester, UK

Re: Urgent G2 gearbox shaft leak help for Newby

Postby clanger9 » Sat Aug 12, 2017 10:10 pm

You need to take the cover off again and have a look. Broken pawl spring?
1966 AJS Model 14 250 CSR "cafe racer"
1993 Ducati 750SS

Committee
User avatar
Posts: 3765
Joined: Mon Jan 01, 1996 12:00 am
Location: EAST YORKSHIRE UK

Re: Urgent G2 gearbox shaft leak help for Newby

Postby Janet » Sun Aug 13, 2017 6:34 am

Ozmadman wrote:
BigJock wrote:BTW lost the clutch because oil level had dropped and the pull lever inside rh cover had locked up.

Don't let the oil level drop keep it right up to the filler/clutch arm plate otherwise you will knacker the box as all the gear are in the top section of the box
Hopefully they still are.
BigJock wrote:Got it back together - thread n superglue. Worked in all 4 gears but rattling in neutral then bang...kickstart jumps rattling like blazes and no gears - anyone????
Praying for you that nothing serious has happened.
Image

Posts: 14
Joined: Thu Aug 10, 2017 1:16 pm
Location: Jockland

Re: Urgent G2 gearbox shaft leak help for Newby

Postby BigJock » Sun Aug 13, 2017 11:10 am

Cover been off 5 times now. All mechanical parts are good. Have had to shim selector rod 3mm between rod arm internal and os cover - only way the pawl will fully contact the ratchet. When cover off the box will select all gears when assyd wil drop into 1 or 2 but not come out again and no the shaft is not binding

Member
User avatar
Posts: 495
Joined: Sat Jun 20, 2015 8:38 am
Location: Chester, UK

Re: Urgent G2 gearbox shaft leak help for Newby

Postby clanger9 » Sun Aug 13, 2017 12:23 pm

It's a bit worrying if you have a extra shim on the gear-side (inside) of the selector shaft. Wouldn't that mess up the selector alignment?
Does it have the correct spacer washer on the pawl side (outside)? It should look like this:
https://www.ifixit.com/Guide/AJS-Matchl ... 77#s172053
1966 AJS Model 14 250 CSR "cafe racer"
1993 Ducati 750SS

Posts: 14
Joined: Thu Aug 10, 2017 1:16 pm
Location: Jockland

Re: Urgent G2 gearbox shaft leak help for Newby

Postby BigJock » Mon Aug 14, 2017 11:47 am

The spacers are on rh side behind selector are mechaism and spacers under 2 mounting bolts for spring retainer. Pawl now aligns with ratchet...more on that later. Another strange thing is solid selector shaft has no grooves for o rings so wjen fitted inside selector tune there is nothing to stop oil running out of box......The box now selects all gears but when in neutral with cluch out you can hear gears chattering away like a bad shift but pull in cluch and sound goes away. Anyone????

Member
User avatar
Posts: 2278
Joined: Wed Dec 14, 2011 1:02 am
Location: ESSEX UK

Re: Urgent G2 gearbox shaft leak help for Newby

Postby Ozmadman » Mon Aug 14, 2017 3:54 pm

Something is definitely wrong there?? you should have two small grooves on that shaft, no wonder oil is pouring out. As for the gears chattering it has to be the issue you have with the extra shims on the selector shaft that is causing the gears not to clear each other completely when neutral is selected, presuming it isn't just the kick start ratchet not clearing properly due to not enough tension on the return spring??
Paul
1960 Model 8
1974 Yamaha RD250B US Model 6 speed

Member
User avatar
Posts: 495
Joined: Sat Jun 20, 2015 8:38 am
Location: Chester, UK

Re: Urgent G2 gearbox shaft leak help for Newby

Postby clanger9 » Mon Aug 14, 2017 5:42 pm

Very strange - and it seems you're not alone. red_dog49 is trying to get his gearbox together at the moment and he's got the exact same issue with the selector pawl not meshing properly.
I'll take a look at a spare 'box this evening to see if there's anything obvious...
1966 AJS Model 14 250 CSR "cafe racer"
1993 Ducati 750SS

Member
User avatar
Posts: 495
Joined: Sat Jun 20, 2015 8:38 am
Location: Chester, UK

Re: Urgent G2 gearbox shaft leak help for Newby

Postby clanger9 » Mon Aug 14, 2017 6:41 pm

I had a look and couldn't see anything obvious that would cause the selector to fail to engage with the pawl.
Perhaps one of these photos will help?

Image
Image
Image
Image
Image
Image
Image
1966 AJS Model 14 250 CSR "cafe racer"
1993 Ducati 750SS

PreviousNext

Return to G2 / Model 14

Who is online

Users browsing this forum: No registered users and 5 guests