REversed Gearbox Camplate - Help!

Matt01 · May 7, 2011

I'm fitting a reversed gearbox camplate from Norvil to my 71 Commando, and I'm having some problems indexing it. Currently I'm trying to index it with the cam plate in 1st and the quadrent lined up with the casiung stud, but I seem to only get neutrals where I should have 3rd and 4th. !st, Neutral and second are OK. Any ideas - I'm getting really good at earing the box up and down....

bwolfie · May 7, 2011

Last time I had problems with indexing, I tried moving it a tooth at a time. that seemed to eventually work. That was with a standard camplate, but should be the same logic for the reversed.

dave M · May 8, 2011

Rather than lining it up with the stud, I generally put the inner case back on and make sure that the quadrant doesn't hit the inner case when it is at both extremes ie 1st and 4th.

L.A.B. · May 8, 2011

Matt01 said:
Currently I'm trying to index it with the cam plate in 1st and the quadrent lined up with the casiung stud

The manual instructions to line (the upper fork of) the quadrant with the stud is open to a certain amount of interpretation as it's easy to set it one tooth too low by that method, it really needs to be set in line with the top of the stud.

Quadrant in the correct 4th gear (1st gear -rev. camplate) position (sorry about the poor photo quality-but I hope you can see what I mean?)

Hobot · May 8, 2011

ugh the position is the closest the knuckle can get to case edge and still allow closure. I'm considering a reverse cam in Ms Peel as cuts some clutter and mass off w/o the over head shift linkage. Hope the next check snicks all 4 plus N.

Chris · May 8, 2011

Hi
My friend John fitted a RGM reversed camplate to his sprinting Atlas. The bike has RGM 's close ratio 4 speed kit. Never had a problem with the standard camplate but he thought it would tidy up the rearset linkage & speed up the gearchange ie stamping on the pedal to go up through the box. However during the season he found that he was occasionally having trouble with the box. Refitted the standard camplate never missed another gear. It would be good to know how the Norvil one goes?
All the best Chris

Matt01 · May 8, 2011

Thanks for the replys _ been out today to the Amberly Show in West Sussex on the 1970 Bonneville, so may have another go at it tonight! Keep the answers coming, and I'll post up what the plate is like if I get it working.....
Anyone wants their standard gearbox stripped down and rebuilt then I'm your man now, I've gained a shed load of experience with this one :shock:

bwolfie · May 8, 2011

I think anyone who has tackled a gearbox rebuild will have it down in the end. I know I do now. I spent 2 hours on my camplate when I did it the first time, now it's a 5 minute deal.

lynxnsu · May 9, 2011

LAB is right put it on the top stud as on std gearbox but on the other end of the camplate detents
somethimes one has to fiddle with the detent spring ,some don't and some do .
Do not know why

Keith1069 · May 9, 2011

Hi Matt, Assuming the indexing gear is correctly oriented (you wouldn't have 1st/N/2nd I guess) to the plate's gear notches have you checked the hairspring in the outer cover? Sometimes even if it is not properly bent (just touching the indexing dog both sides) it will do 1st and 2nd OK but struggles on 3rd/4th. Just a thought?

REversed Gearbox Camplate - Help!

Matt01

bwolfie

dave M

L.A.B.

Moderator

Hobot

Chris

Matt01

bwolfie

lynxnsu

Keith1069

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