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About ikb

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    Advanced Member

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  • Bike
    Sherco & Montesa 200

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  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
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