Cub barrels.

[Twinshock200]

I have seen and ridden several highly modified C15's while I have been over in the UK and they all have one major problem,, that engine is so heavy compared to the Cubs, Bantams and others they compete against.
While I was looking for some pretty C15 photo's that I took, I found these of an M10 at the Telford show which I guess we can all appreciate.
I've got some pretty Cub photo's as well if anyones interested.
Cheers

[whitehillbilly]

Nice original looking DOT, looking forward to the Cub pics.

whitehillbilly

[TriCub]

Here are some more Flash Cub parts that they claim are replicas. Can't say I can see the CNC machining marks in my originals. Perhaps my eye sight isn't bad enough yet.
A bit pricey for me. Think I spent less than a set of "Replica" trees to build my entire bike.

http://www.xblok.co.uk/www.xblok.co.uk/info.php?p=8

[Andy M]

I currently ride a Bantam,(BMCA UK) my next project is going to be a C15, I have the engine, the weight against a Cub is an issue. I have been offered 2 early cub engines recently, trouble is they can cost a fortune to get sorted when a C15 doesn't need much to make reliable.There are quite a few C15s in the BMCA trials in the UK.

[Twinshock200]

Here's those Cub pics I promised.

[Geoff Lewis]

Hi All, My Cub is a 1957 model and is quite gutless and handles poorly but is pretty much as a Cub would have been in the day and not at all suitable for modern sections. It does sound fantastic however. Does any one do fork seal holders for Triumph forks, maybe ones that hold a decent, double lipped fork seal. I need to recommission my Vibsa , the forks have new seals but leak like a sieve. They are the forks with spring inside and a sort of castellated seal holder with a measly 3.5mm thick single lipped seal. or any other fix? I don't want to spend a thousand dollars on fiddle forks either! Has any one weighed various engines. I would guess the bantam would be the lightest followed by Cub. My CZ engine weighs 35kg with Carb. My Vibsa engine (Villiers 32a with Parkinsons weighs 35kg) C15 looks heavy but with Alloy cylinder maybe not so. They have a lot of power which helps.
Regards Geoff.

[TriCub]

Geoff.
The biggest problem with the forks will be worn out bushes. The seals no matter how good they are can't cope with any radial type movment, other trick is to use really heavy oil. The heavy oil helps to get a bit of damping and leaks a bit slower. The other thing to do which to me is not really in the spirit of the class is to take a set of Jap forks the same diameter, machine the sliders down till they fit inside the steel Triumph bottoms and epoxy them in.
My cub has forks off a 500 twin with the springs on the outside. Don't know if their any better than the internal spring jobs but they cost me a carton of beer and keep the front off the bike up. I honed them and made new good fitting bushes and run gear oil in them and haven't had to change the seals as yet.

Haven't weighed any engines but I do know that the early Cub engines like your 57 and my 56 are a lot lighter than later 63,64 and 65 square finned engines. A lot more fragile though. The Bantam would have to be a bit lighter but their barrels are quite a heavy little thing.

[whitehillbilly]

Hi Geoff, go any good with the 32A heads ????

whitehillbilly

[TriCub]

Question for the classic riders that we haven't heard from.
Earlier in this post I brought up the subject of a claimed to be replica alloy Barrel that may not be exact copies of the original. We heard from the normal vocal few but what does everyone else think off the trick CNC machined billet parts like the triple clamps and hubs that are claimed to be "Replicas" from the link I posted.
Do you want the sort of Cub in Rogers last photo to be eligable in Australia?
I personaly think we need to keep thing under control some how. If it's ok to use a "Replica" barrel that isn't quite a replica then what's wrong with using all the other replica parts available? It would make a Cub like the one in Rogers photo a winner in Twin Shock and make a near stock Cub look stupid.

Roger you should give us a run down on that Cub in your last photo. Is it meant to be a pre65 bike? I see it has the square fins which make the motor post 64, a MK1 Amal which is from 1966. Forks look a bit more modern than 64, frame is not an original either with it's different top tube and lowered rear sub frame including the canted forward rear shocks. Frame looks to have no bottom rail either. Has the "replica" billet triple clamps as well by the look of it. Does it have the billet hubs and tubeless rims?
Do they claim a weight on the finished machine?

[whitehillbilly]

http://www.ebay.co.uk/itm/pre-65-trials ... 20cf9bbdfa

whitehillbilly