Pre-65 Bikes

Can someone recommend what type of overall 1st gear ratio is good for a C15? Currently I'm at 23:1 which is too tall. (this includes 1st gear, primary and final) I have seen recommendations of 30:1 and 35:1 for other bikes but am not sure what is appropriate for a C15. Local events have very tight turns. Thanks!

Morning all. Physically fitted but no spark, could anyone please confirm for me stator connections to ignition unit (spade connectors) for blue and black leads. Also I have timed it at 5 degrees BTDC using the mark on the rotor with the closest mark on the stator. Apologies for really simple questions but didn't get any instructions with the system. Thanks.

Can someone please let me have Mick Dickingson's (I think that's his name) contact details? The chap that makes the Ariel short stroke barrels. Thanks

Anyone out there know of any C15 trials specialists I can speak to as regards engine set up - camshaft specs in particular? I know there are several around who can build nice motors but I don't know who they are unfortunately. I'm a bit lost with Beezas as I have very little BSA knowledge (shamefull I guess as I am from the home of BSA...)

Hi all, I am having trouble getting my c15 running right, i recently bought an Amal concentric fromm surrey cycles " 24mm with a 110 main jet" and it just wont run right, i was told it would be jetted for my bike, but after playing with it at the Blue Bar 2 day trial this week i had no joy! In the end i borrowed another amal from a friend and this was much much better, but it was a 22mm and had a 140 main jet. Please can some of you out there that a run C15 tell me exactly what works best.. or even if they have a carb that they will sell, it doesnt have to be an Amal, any make will do. thanks: Scrumpy

If anyone is interested: Greeves

Just wondering if anyone knows the weight of bantam front hubs (the single sided ones that get widened)....cheers

For those who posted their entry after the 15th December, Please contact the secretary to confirm it has been received. With all the white stuff and Pat having difficulties getting around it may be worth while!!!!!!!!!!!!! Thanks Jim 07917475837 bewdleymcc@aol.com

Any recommendations for best spark plug to use with a C15, PVL Ignition?

Hi guys,first D14 build, can you answer what is probally a stupid question.Can I plug the hole in the l/hand inner crankcase where the split pin (no.60-2721) sits.I'm fitting electronic ign. Is it a breather hole/drainer i don't need any more? Sorry for my stupidy,it's not a villiers!!! THe 4 speed g/box was a b***er too! Thanks for help,

A question to make Charlie P despair! In the lightweight class we have had the James, Triumph Cub and Bantam eras, all machines passed as being pre-65 in style and substance. What might be the next all victorious model in this class.

Can anyone help identify this Alloy barrel which came with some Villiers engine parts ?,it fits Villiers 37A cases and is 66mm bore . I'm sure its a trials barrel not scrambles

Found this pic on a USA site, superb workmanship but would need a hinge in the middle for Southern UK trials!!

Hello all, Just joined the pre65 brigade after purchasing an otter framed B40. Is there a service manual available that could give me information such as oil types/quantities, servicing tips etc? The bike is in good condition but needs a few sessions in the 'Cosmetic department' and a good checking over...any help would be appreciated. Thanks in advance, Mark.

REH forks currently seem to be the preferred choice for anyone looking to build a competitive pre 65 bike. The matching yokes are listed as having an offset of 40mm, which is a bit less than the original setup on my Bamford Matchless, and by my calculations would increase the trail from approx 4 inches to around 5 1/4 inches. Any of my background reading would suggest this would be a bit excessive. There's no doubt the REH fork movement feels terific, but I'd be interested to hear from anyone who is using the REH yokes on a pre unit bike (particularly those with more traditional frame geometry) how the reduced offset has affected the handling, if at all?

Would anyone have a pic of the above, as I need to order some hopefully this weekend and SM don`t have any pics on their site. Also would be grateful of other recommendations? cheers

I have a Cub on the old coil system and need to add a kill button. I am not the best at electrics, can anyone tell me what and which terminal I should earth for the kill switch? There is no battery by the way.

Hello, I wanted to know the correct procedure for adjusting the clutch on my 1958 Tiger Cub. In a previous post on this forum, I found the following: Release the cable at the handlebar lever Turn the central adjuster in the pressure plate clockwise gently until I feel the clutch arm touch the outer cover. Turn the central adjuster 1/2 turn anti clockwise then tighten the lock nut. This gives around 1/2mm free play. Re fit the cable at the handlebar lever and adjust to suit - again a little bit of slack. I then only tighten the 3 clutch springs enough for their heads to clear the inside of the primary cover, but I check tha…

looking at the ht on ebay could you ride it as is, and be competitive in pre 65 trials?

REH forks currently seem to be the preferred choice for anyone looking to build a competitive pre 65 bike. The matching yokes are listed as having an offset of 40mm, which is a bit less than the original setup on my Bamford Matchless, and by my calculations would increase the trail from approx 4 inches to around 5 1/4 inches. Any of my background reading would suggest this would be a bit excessive. There's no doubt the REH fork movement feels terific, but I'd be interested to hear from anyone who is using the REH yokes on a pre unit bike (particularly those with more traditional frame geometry) how the reduced offset has affected the handling, if at all?