trialsrfun

There is no reason why the set up you have should not work but when the tensioner is swing arm mounted spring tension remains constant throughout rear wheel suspension movement whereas if the tensioner is fixed to the frame it then varies due to the chain moving nearer to or further away from it, obviously the nearer to the gearbox sprocket you can fit the tensioner the better .

I have found the TY175 type work well when mounted to the swing arm on my PJ bike, fit it immediately behind the footrest mount checking the suspension movement arc for clearance between tensioner bolt and frame. Because they are outside the chain not between chain and tyre mud is not scraped off the tyre by the tensioner arm.

It is looking good already, what engine set up will it be 199cc, also are you staying with the Montesa forks?

Possibly a MAC frame there are similarities but whatever it looks like a good bike to own.

Do the pictures show the bike you have?

Barfast Engineering Supplies Engineers' merchant in EnglandOpen OVERVIEW REVIEWS PHOTOS 1 of 3 DIRECTIONS SHARE Barfast is the place to go for metric fine or non iso metric sizes. SAVE Watermills Rd, Newcastle ST5 6AT Open ⋅ Closes 5PM

Please include me in as interested in one of the kickstarts.

I like the look of the tyoffroad system you have on your bike feetup, did the Yamaha heat shield fit easily to it.

Thank you feetup, I have found a long exhaust pipe and silencer set up essential for good performance with the Villiers engines.Plan is for a Kato type pipe for the TY 175.

I am thinking of making a new front exhaust pipe for a Yamaha TY 175 but have variously read that lengthening/shortening the front pipe on a TY 175 brings about a performance improvement but which is right longer or shorter, what difference would either option give?

Hi Mark, the carburettor fitted is a Villiers best place for all things Villiers is https://villiersservices.co.uk .Normally a well set up villiers carb gives good running so probably nothing too wrong best to check all the things already mentioned also their is a bakelite plug lead to coil connector piece that can be troublesome but if ok works fine. I would clean the air filter, clean and airline the carb pay particular attention to the needle which sits on a spring and is adjusted with a screw from the top, plug cap and plug, check timing and spark. Good luck the bike looks great.

If you feel the current gearing is too high then either go smaller on the gearbox or larger on rear wheel, I assume the sizes you quote are for 428 chain, is this the chain size on your bike 520 is also listed? 520 links are longer but slightly thinner than 428. If you divide the number of teeth on the gearbox sprocket into the number on the rear this will give you the ratio. 428 chain 60÷14=4.28 I think trialsbits sell a smaller engine sprocket which would lower the primary gearing best to be certain what you have then speak to trialsbits.

I buy from this link https://www.trialsbits.co.uk/index.php?cPath=78_107 hope this helps

There is no problem at all if the correct stud is used, it fits through the hole under the clutch arm through the frame tabs and engine mount. This has a fine thread at each end (cycle thread 26tpi) just fit a plain washer under each nut it will not come undone. Good to use one for the lower mount as well, Villiers Services should have them or they will point you in the right direction. Also a good idea to cut a shallow slot to suit a screwdriver tip at one end so that the stud can be held or turned when assembling. These are what you need https://www.ebay.co.uk/itm/271778047353 I normally get them from the show at Telford which was last week or Stafford in April. Like the bike.

http://www.duckswax.co.uk This is made by a fellow trials rider and works like a dream on my Gaerne oil finish boots. I speak only as a satisfied customer, if you went to Telford Show it was available there from the duckswax stand.

If you look at the two lines on the left picture posted by Carl you can see that the space at the lower end is greater than at the top this is where the 20mm comes from.

I have also ridden both Rev and Evo bikes on many occasions, both models turn equally well. Possibly some of the earlier Techno models with upside down forks handled differently but cannot comment on those. OTF http://www.aqueductclassics.club http://www.gresfordclassic.co.uk

OTF this club who usually have a stand at the Telford show might be your nearest http://narberthclassicmcc.co.uk Aquaduct and Gresford clubs a similar 50/60 mile trip are other options.

For a modern bike either Beta 200 or Beta 250 Rev or Evo, whichever buy on condition not price alone. We have family in Aberystwyth and while there are enduro events around the mid wales area very few trials seem to be held which has you say given the available terrain is surprising. Might we yet see a Ceredigion Classic Trials Club formed??

Very nice job you are doing, hope you continue to ride it when completed.

FWB Products @ Stoke on Trent https://www.fwb.co.uk/ or Barfast http://home.btconnect.com/barfast/ these people also stock metric fine, I highly recommend Britannia Fasteners Burslem though they do not have a website.

Hi Boner, yes shoulder is correct. A bolt is threaded part way along its length. If fully threaded up to the underside of the head then it is a set pin. Either type is measured from end to underside of head so length does not include the head.

In addition to the above is there also a boost bottle pipe connector which would need blanking off?

Rode in the above trial today, well done to the new team running the club well laid out sections, a good sized entry a very enjoyable event. Good luck hope to see you at future trials.

My original reply was somewhat tongue in cheek as my own Cub has been a bit diificult and very time consuming to get working properly whereas the C15 though a heavier bike seem less trouble prone. Islandjj I would not be put off building your Cub but I think best and easiest frame to use would be Triumph Tiger Cub. Armac produce some excellent parts which will fit well exhaust, mudguards, yokes which would make for easier build and better finished bike.