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Everything posted by ikb

  1. If you can find the aluminium tank that goes under the shelter on the earlier models it can be made to fit into your fibreglass tank. Just cut out the bottom with a hacksaw blade then the aluminium tank will drop in with a little reshaping and glue it in with builders foam or silicone. Then you end up with a nice sturdy unit that’s full petrol proof.
  2. Just a piston update, I’ve gone for a Mitani 53.5mm B100 piston which is only 0.5mm less than the super 6 piston giving 125.8cc. I don’t think I’ll miss the missing 3 cc! Ian
  3. Thanks I think the super six is the T20 and according to various websites the part number for the pistons are the same for the early GTs , but I will check again. Ian
  4. Hi, I have just acquired a 1968 Bearcat which is the ideal starting point to build a Gaunt replica! Being the latest model of the Bearcat it has the B100 frame with the TC120 dual range motor it’s perfect for the job! But I have a number of questions... Forks, These should be from the Invader 200 are they still 30mm? And looking at photos they must be a bit longer if so how much? If I can’t find any Invader forks I’ll find something suitable that looks right While we are at the front did Peter alter the head angle? Hubs These look to be smaller than the B100 or Bearcat hubs, possibly A100 or A50? Swinging Arm I know it’s about an inch longer but does anyone know how much exactly? And what length shocks would be best? Engine, So far I’ll just be fitting the T20/ GT 250 piston as it needs a bit of a rebuild anyway Any information is welcome Thanks Ian
  5. ikb

    Bantam D14

    See attached picture showing all of the ratios, the swapped second gear can be used in sections ok depending on your sprocket sizes and rider weight . The best thing about the low second gear kit is the higher top gear! Hope the spread sheet makes sense
  6. ikb

    Montesa 242 tank

    Mine has an eccentric steel boss where the front bolt goes through allowing some adjustment.
  7. I have one somewhere as I have dropped the foot pegs on mine so I am using one I made. I will have a look tomorrow. See pics below of before and after
  8. I fitted one and it's really good, clears fully and has reasonable feel. The clutch i fitted was a second hand ybr 125 clutch but I have dumped the bantam actuator and made my own cam type unit which may help with the feel!? Ian
  9. ikb

    Crankcase Paint

    Don't use PJ1.... I used it on my Cota 200 3 years ago and it was great so I used it this year on my 242 but I think the formula has changed as it is not petrol resistant any more! A small splash of petrol just dissolved it, I thought this WA because it had not cured as the engine had not run much but after two days of running it looked a mess so I had to repaint. I was able to wash off the paint with petrol as if it was a kids water colour! I have now used VHT case paint it's better to apply and is petrol proof but not rock proof!
  10. I have had a new mikuni but now use a Dellorto which is just a bit sharper same jets as a Gas gas 125!
  11. It's just a 5 minute job anyway.....you just line it up so it engages in the right place! But hard to explain
  12. ikb

    2015 300 Fork Air Gap

    http://www.formula-italy.com/en/support-moto-manuals All you need to know here
  13. ikb

    Cota 242 Gearing

    Hi, My 242 is nearly finished and I was wondering what the best gearing is? It's the early version with the low primary gearing so when new would have 10 front and 38 back sprockets, when I got it it was 9 - 38 but I only rode it for a few minutes. I would rather not have a 9 on the front so maybe 10-40 or 42? Anyone out there with recommendations. Ian
  14. ikb

    Cota200 Gearing.

    I use 10 - 42 and it works well I can use 1st and 2nd in most sections and hardly use the clutch. It's also quite a bit lower geared than modern bikes so it may just seem slower to me
  15. ikb

    2014 300St Airbox

    Ant idea which way the rubber reducing ring should go? I guess the alignment mark at the top facing away from the carb!
  16. And without travelling more than 50 miles
  17. Next step is to put some flags in to define where you turn! Start with them about where you were going on the video then start making them tighter. Ian
  18. I think those tensioners were after market ones as I had 2 new 200's in the olden days...... We can talk about it in the rain tomorrow
  19. They had chain tubes when new that kept the chain off the swinging arm and no tensioner. I made my own slipper and fitted a universal tensioner from Trialsbits
  20. But more expensive than the Elf HTX! Would like to be paying£10 per litre rather than £28
  21. ikb

    200 Cota Carburettor

    Best bet is to replace it with a Mikuni or I like the Dellorto jetted for a GasGas 125. The dellorto gives sharper pick up compared to the Mikuni ( not sharp compared to a modern bike!). The 200 came with both mark 1 and mark 2 concetrics, yours is the mark 2. ian
  22. I had to get my piston from Southwest Montesa in the USA, I think it was about £120 ish. I got it sent to a friend over there and he sent it to me a a gift to avoid import tax. Ian
  23. I like buying privately as you can talk to the owner and quiz him on what events he does, what maintenance is carried out etc. also if you look around his garage and see a good few spares, bottles of oils and a well equipped tool box it gives you confidence that the bike has been looked after!
  24. Gate house garage whorlton, G T Hodgson & Son, Darlington Darlington, DL2 3PT They don't need any lights
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