Author Topic: 3 speed gear change travel  (Read 253 times)

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Offline Rusty

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3 speed gear change travel
« on: February 03, 2019, 04:26:08 pm »
Hi all,
Really enjoying the site with all the help and the banter that goes with it.
Hope someone can help, I'm in the process of engine drive side crank bearing change, well, that was all I intended anyway, but you know how it goes, if you get that far, might as well do this and that while it's apart!
A question on the 3 speed box gear lever travel, it feels like a long distance between gears (not counting neutral) and wondered if this is "normal"? I'm tempted to open up the box to see what wear is on the change plate etc. or am I chasing what is a a fact of life with the C11 3 speed? Any hints welcome.
While I'm here, another question on the head and barrel painting, I've managed to dig off 70 years of build up ( would not have helped with cooling the old girl!) and want to re-paint with High temp. paint, but seeing the depth off pitting on the fins, I thought about surface prep. Has anyone tried a VHT undercoat to build up before finish coats? Any hints on brand or type would help too.
Cheers
Rusty

Offline Owen

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Re: 3 speed gear change travel
« Reply #1 on: February 03, 2019, 04:39:48 pm »
That's one of these open ended questions. Can you quantify how far yours moves so others can compare?
1940 C12 (350cc)
1945 C10 & C11
1953 C10 & C11
Anyone want a B20 in need of a lot of tlc

Offline timsdad

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Re: 3 speed gear change travel
« Reply #2 on: February 04, 2019, 08:56:45 am »
Compared to later boxes, Rusty, they are a very long travel and will seem strange until you get used to their little foibles. When putting into first from neutral, and also when changing down on the road, I find it easier to put my foot in front of the lever and hook it upwards with the top of my heel. The funny seating position doesn't help if you're a bit tall.


Any high temperature paint will work well enough on these old heads and barrels. My paint of choice is the little tins of black paint that is specifically meant for this job. I could buy it at any local dealers back in the day but the only place I can easily get it from now is mail order from the Vintage Club shop. I mostly just get an aerosol can of high temperature black satin car engine or exhaust paint now from a motor factor and it does the job. I've grit blasted and undercoated, baked in the oven and generally took all sorts of trouble but it doesn't seem to look much better than a quick clean up and blow over with a couple of coats of exhaust paint.

Your choice, really, how much trouble you want to take. I'd rather be riding the things while I still can!


Ray
Just a motorcyclist.

Offline kdm

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Re: 3 speed gear change travel
« Reply #3 on: February 04, 2019, 11:23:11 am »
B&Q also sell high temp paint, for bbq's and the like, works well
1954 C11g

Offline Rusty

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Re: 3 speed gear change travel
« Reply #4 on: February 04, 2019, 12:01:29 pm »
Thanks all,
Will measure up the travel on the gear shift, but sounds like it's a matter of getting the hang of a "C model heal and toe" jig.
You're right Ray, I could spend a lot of time making it look pretty, but need to get on, and get it rideable, will head to B&Q  BBQ section, and make out that I'm being brave and getting the grill ready for a break in the weather! (Phhh, I may be Ozzie, but I'm not completely crazy  ;D)
Cheers
Rusty

Offline chaterlea25

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Re: 3 speed gear change travel
« Reply #5 on: February 04, 2019, 06:09:29 pm »
Hi All,
I have had good results with "Rustolium"
barbeque paint,  it's has a bit more of a say in finish than the flat black exhaust paint that seems to go greyish when it dries
Unfortunately it seems the local shops no longer stock the Rustoleum brand so I'm down to my last tin
John

Offline Crashtestdummy

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Re: 3 speed gear change travel
« Reply #6 on: February 04, 2019, 06:29:53 pm »
Rusty, I had similar concerns about the three speed gearbox until taking advise from the guys on here, after taking all advice on board I have her changing up and down almost reliably, great fun to ride, treat it for what it is and stop comparing to a modern gearbox (that was the best bit of advice I got).

Andy

Offline stev60

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Re: 3 speed gear change travel
« Reply #7 on: February 04, 2019, 11:21:05 pm »
Rusty
Ive taken a lot of advice on this forum, all good, the 3 speed box ive found  needs all its working parts , to be right, a little wear and they can be troublesome, I wouldnt worry about travel, Ive just got used to mine and its odd ways, they keep you on your toes,unlike the four