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Messages - paulrb

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British Bikes / Re: 5 Speed Bonnie gearbox help
« on: February 26, 2007, 01:55:29 AM »
I got the main shaft and cam plate out.. The plate is really worn but the mainshaft looks fine, The main shaft is tapered so you are right the clutch hub cannot affect the length, I think I am clutching at straws due to frustration, sorry for the pun.. I tried to attached a photo of the cam plate but the picture is too big.

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British Bikes / Re: 5 Speed Bonnie gearbox help
« on: February 25, 2007, 11:44:04 PM »
Hi

Looking at the camplate, dosen't look good so I decide what the heck pulled the clutch apart as I need to get the main shaft out to replace the camplate. Looking at the clutch hub I wondered if I pushed it on too far so the length of the mainshaft to the gear box was too short?
Decided to buy a run around on ebay so I have some wheels and do the Triumph justice in the rebuild than rush. The wife thinks I have bought another project. Gonna get banned from ebay..

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British Bikes / Re: 5 Speed Bonnie gearbox help
« on: February 25, 2007, 07:03:10 PM »
Hi

I have not pulled the clutch apart but loking at the gears again (I can now take them out blind folded) I am more convinced it is the camplate, Because I had to get new layshaft selectors due to the lugs worn and the plunger slots are corroded on 4th and 5th but looking at the grooves in the camplate they look more of a point in places, I thought they would be smooth. I have been searching for a picture of a camplate as the manual is not clear. To be honest I am more reluctant to change this as I will have to remove the main shaft. (probably why no one else has changed it)
I will have another play with it today.. but leave the clutch alone thanks..






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British Bikes / Re: 5 Speed Bonnie gearbox help
« on: February 25, 2007, 06:32:20 PM »
Hi

I have changed the layshaft selector forks and cleaned the camplate but still find it hard to get the high gears, even by turning the camplate without the plunger or quadrant attached. I may need to replace the camplate which is a bigger job than I anticipated. At least I got the needle rollers back in..
I may look at the clutch first as the springs maybe too tight, not sure if this would casue it but you never know.

It certainly has me thinking...

Paul

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British Bikes / Re: 5 Speed Bonnie gearbox help
« on: February 22, 2007, 06:39:03 AM »
I may of found the issue, I have worn lay sahft selectors (lobs that insert into camplate), however the camplate has heavy corrosion on the fourth gear indent. I have read before on forums that you can use a dremel to repair corroded camplates. Also on top of this I found small pieces of needle roller bearing from the rear part of the layshaft, probaby difficult to replace? At least the gears are new..
I have my work cut out to repair this.. summer is rolling on too.
I am starting to think it would of been easier to put the engine on the bench to work on or aquire a bike lift.
Thanks for all the advice
Paul

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British Bikes / Re: 5 Speed Bonnie gearbox help
« on: February 22, 2007, 02:28:07 AM »
Hi

I have looked at the selectors, they do not look bent but the lug which insert into the camplate looks chipped and worn on two of them (layshaft selector, not the main shaft 4th). The other thing that concerns me is I fitted a new clutch and belt drive and I may not of driven home the clutch hub as the main shaft to the gearbox has a lot of play pullng forward and tends to drift upward thus I have to push the shaft down to engage through the bearings of the gearbox cover. I seem to have good gear selction without the gearbox cover or quadrant engaged. Its a bit baffling. I will have another play with it.

 ;D

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British Bikes / Re: 5 Speed Bonnie gearbox help
« on: February 21, 2007, 04:39:01 AM »
I can find all the gears with a tyre lever but it is stiff, it is not exactly a gemtly levering to move the quadrant.  I cannot move the quadrant with my hand. The quadrant does not touch either side of the slot. But when I install the outer cover the LH gear change is easy for 1st, 2nd, 3rd but difficult to find the other gears even whilst rotating the wheel and pulling on the lever. I am starting to wonder if I need to look at the selectors again. Maybe the 4th 5th selector is worn, or something is not lining up, maybe shafts?
I am getting somewhere as I have all the gears moving the quadrant. Wish it was RH change instead..

8
British Bikes / Re: 5 Speed Bonnie gearbox help
« on: February 21, 2007, 02:25:37 AM »
Thanks

I will give it a go tonight. I think the camplate is in the right position with all the gears, just timing the quadrant. As I have never had this bike running before (bought as a non runner), I have changed so many parts such as the clutch, it is hard to isolate the problem.
Cheers

Paul ;D

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British Bikes / Re: 5 Speed Bonnie gearbox help
« on: February 20, 2007, 07:00:15 AM »
Hi

I think I got fourth with some force on the gear lever. Yes I believe I have engaged first rotating clockwise. First and second seem very smooth. maybe it is something to do with the selector for 4th and 5th. I have a recon gearbox. but the selectors are old.


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British Bikes / Re: 5 Speed Bonnie gearbox help
« on: February 20, 2007, 06:45:56 AM »
Hi

Yes I have a workshop manual too and which has more detail. I built the gearbox in neutral and I seem to have all gears moving the camplate and rotating the wheel. but when I assemble the cover with first gear seleted and with the quadrant on the second tooth, I only get three gears. I have also tried various positions around the second tooth.
I bought the bike in bits and the last part to finish is the gearbox. I got my MOT last week with only three gears. (good job the gearbox does not need to work for the MOT and I only had to go a short distance). I thought I had all the gears before I took the bike for a test ride..

I have also changed all the springs in the plunger too. I think maybe I have got it right at some point but maybe I am waiting for a completly slick change box whilst it is oil free!

Thanks for the advice, I will give it another go. Its been a bit of a challenge.

Cheers

Paul

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British Bikes / Re: 5 Speed Bonnie gearbox help
« on: February 20, 2007, 05:03:32 AM »
Hi L.A..B

I was reading with much interest the thread of a discussion on the woes of timing a 5 speed Bonnie gearbox. I too am in frustration :'(, I recently bought a T140V as a project with a recon gearbox in pieces to fit. I thought I had it right, got the MOT but only have 3 gears from the 5 and difficulty to engage. The manual and haynes give different methods to align the quadrant. I have the gearbox selected in first then align with the second tooth on the quadrant. I have tried above, below etc like Andy in the discussion thread.

Any help would be much appreciated

Paul

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