Pre-65 Bikes

Hi, Fuel cap Have seen several pics of beautiful slim ally fuel tanks on P65 bikes, they all seems to have "KTM-like" fuel caps; does anyone of you know if "ready to weld on" ally tubes with threads are available? Or if machining threads by lathe is the only way? Cut loose a plastic cap tube from an MX fuel tank, and fastend/seal it from the inside before the ally parts are welded together, might be possible? Airbox Are any of you using 4-s airbox from Sammy Miller, eg for Cub or B15? If yes, whats your opinion about performance verses KN-like filters, that offering a hard time jetting because of non defined air volume... Regards, Pat

I am in the middle of restoring a 64 Dot with 37a square barrel motor for classic pre65 trials competion here in Australia,but it is hard to get any info over here. I need to known the best set up for trials gearing,primary rato ,secondary ratio front rear sprockets etc. ,gearbox ratios etc,,,it looks like this motor has had the gearing changed in past maybe to used as a scrambler so i need to known the the best set up for trials and where to get sprockets gears etc. What sort of 1st gear ratio should be aiming at. Thanks in Advance Peter

Photographs of the 2011 Pre '65 Scottish 2 day Trial, here: http://s1083.photobucket.com/albums/j381/Senor_Esteve/Pre%2065%20Scottish%202011/ Please note, I retain all Copyright to my images. ..........you will have to navigate to the sub-albums, Day1, Day2, Paddock. I was spectating on Day 1 at Cnoc a Linnhe and Pollock Hill and on Day 2 at the top of the 2nd Sub of Pipeline. The slide show doesn't provide very high resolution. To see at 1024x768 resolution click on the first image to open it then click on it again to see it at 100% then use right arrow to go to the next image. left arrow to go back, up and down arrows to scroll image up and down. F11 to maximise th…

Hi Guys Finally i got OSSA Mar forks for my BSA C15 project. I have couple of questions, > There is oil leak from screw on fork leg. I tried to tighten it , but its thread is gone , how to fix it ? > What is easiest way to hook OSSA forks to C15 ? . Should I use C15 ball bearing race to OSSA yokes. or should i use C15 yokes ? and OSSA forks legs . I prefer to use OSSA yokes if possible , they seem more suitable to me. I am attaching pictures .. please advise. Thanks in advance Cheers Talha

Hello, Can anybody specify the width of a Bantam D14 4 rear hub and/or specify the part number? Had got a hold of a Bantam rear hub to put in my trials Cub, with the idea it is a bit wider/stronger wheel. Ordered all the parts from CWC accordingly, build it up and now spokes are sticking out inside the rim for about 4-5mm... so am a bit baffled what went wrong. Hope someone can tell if my D14 4 hub is not what I bought if for (only have a bunch of Cub part catalogues) and suggestions for solutions? Thank you in advance!

Does anyone have contact details for Roger Heap who lives around the Preston or Lancaster areas please ?

Just fitted an Amal stay up float kit to the concentric carb on my bike but now it floods as soon as the fuel is switched on, have tried to lower the float level as well as checking the viton tipped float needles operation but without effecting a cure. Any ideas please.

Hi guys, Please see images of my Cub casings.Just split the engine. The first casing shows an area milled out and a plate inserted with four Allen screws inserted. Is this the mod to allow access to the oil pump. You lads who know there stuff will probably recognise the model of engine but it’s a 1961 year model. The second casing, well, I’ll wait for some ideas, is it to allow the gearbox sprocket to be removed without having to break the motor. It’s a really poor fit. Thanks.

Earlier this year there were some photos of competitors in the Scottish Pre 65 trial on this site. Can they still be accessed?

Hi, I've been riding twin shock since they were all there were, and more recently modern pogo sticks. I have decided that I need to get the cub I have squirreled away up and running. I know of companies such as Armac and upb, but names like Allan Witton and Max Heyes, Ray Small etc etc, keep cropping up here and there. Is there a place that I am missing? Where I can get contact details for these sort of people? Cheers Trev.

So, still got the metal on metal noise after the bike has run for around 10 minutes. I sat looking at the engine tonight waiting for a eureka moment and maybe I had one. Have a look at the picture, could it be that as the oil heats up it just flows downhill to the inlet rocker and doesn't bother to flow uphill to the exhaust rocker? The oil starvation from the exhaust rocker then creates the noise.

Some advice please as the instructions although simple are not clear. I'm fitting to a bare crank. The kit has a small spacer. Do I fit this behind the sleeve and rotor, touching the primary or under the crank nut. The choice will of course move the rotor outwards by about 5mm. Any assistance welcomed

Hi: What is the best timing for a Villiers 37A? I have to fit a new electronic ignition for my Greeves and not sure about it. Thanks for the help.

I've just acquired a Bantam trialler, with a view to replacing the SY250 heap of engineering sh*te that I got the other week. The new steed is a 1969 D14/4, I understand, a bit heavier, like me, but at least the plug can be changed without removing the tank and radiator, and the float bowl removed without the prior removal of tank, rear mudguard, air filter/box, muffler, aluminium spreader plate, and gas shock. The frogs must be taking the pus. Back to the plot - I don't know what petroil mix to feed the Rooster on. I was using Morris' "Sport Action 2" synthetic oil in the sulking frog, but that is a lot different to the "Gloopy" stuff that we used to have 40 years a…

i ve aquired a c10 that is running a 6v battery on total loss, it'll do a single venue trial on a charge no problem. i want to do road trials on it this year though, most of the PJ1 series , a couple of Miller rounds and a LDT so.. would i gain anything by changing to 12v and for a bit of longevity for the road trials should i if i opt for more APH and if so how much.. ?

The clutch on my 350 Matchless has seen better days. It is starting to slip and could do with a new set of plates. Given the price of new plates, this would be an appropriate time to upgrade the whole clutch. The current approach seems to be to fit a jawa clutch. I've never had any problems with the original, is it worth changing, and if so what is the best option!

Hi Can anyone advise on the level and grade of the oil for best performance on Betor forks taken from an early Sherpa. As they are in long Triumph bottoms, the quoted volume doesn't help. Should the oil cover the top of the damper rod on full extension? Trouble with this is that oil sprays out of the breather caps during events. The anti-splash pieces on the spring bottoms are in place. On full compression, the oil is about 4 inch from the top of the stanchion. Any ideas? What grade would be best for the UK climate? Cheers

Hi, I am just finishing a Tiger cub trials project and would appreciate any advice on the rear sprocket. The current chain is a 520 and I see from the manuals and most postings that a 420 is the standard size. The 520 clears everything and I would like to stay with this if possible as it will be stronger and will cope with the awesome power of the 275cc upgrade on it...... Joking, the power is still not arm-wrenching but it does sound excellent! ;o) All the sprockets I can find on the interweb are 420, can anyone advise on where to go for a 520? Best Regards

How much or what difference does running an r cam over a std cam give?

Anyone recived any yet?