175 Rules

Direct from the main web site and for all to see and be reminded:
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All machines will be of 190cc capacity maximum.
2. ENGINE: Modifications to engine or gearbox are allowed, provided that conditions (a) to (i) below are met: -

(a) Bantam crankcases must be used, and remain externally unchanged, except for increasing stud centres to 60mm, on 52 and 55mm versions.

b) Stroke to remain standard (58mm)

c) Disc valve and Reed valve induction is prohibited.

d) Pressurised fuel injection is prohibited.

(e) Only BSA close ratio and BSA normal ratios gears or exact copies (e.g. AA Snell ) to be used. Maximum number of gears: three if close ratio, and four if normal road ratios

(f) Only standard cylinder barrel to be used, but may be modified internally.(Alloy Todd and BTW copies deemed to be standard but to remain externall unchanged )

(g) Cylinder stud centres not to exceed 60mm

(h) Water-cooling prohibited

(i) Ignition to be fixed timing. (i.e. not advancing or retarding type), however Ducati Energer and PVL straight line (max 4deg retard are allowed)

(j) Exhaust power valves prohibited.
3. FRAME: Must retain Bantam main loop, but may be modified.
4. WHEELS: Must retain wire-spoke wheels.
5. BRAKES: Front Brake: No restrictions except Wavy or Carbon Fibre discs not permitted.
Rear Brake: Must retain Bantam hub (may be modified)
6. FORKS: No modern 'upside-down' forks may be used, although original Bantam upside-down forks are permitted.
7. TANK: Must be mounted in normal position on machine.
8. FUEL: Only Petrol or Avgas 100LL mixture to be used.
9. CARBURETTOR: Size: 38mm maximum, circular bore only.
10. ACU standing regulations for road racing machines apply (where applicable).
11. Any rider winning the Bantam Championship on a 175cc machine must progress to 125 thereafter

Version 01-12-04 (modified).

Rules Checked By: A.F. Moulden, 01-12-04

Hi Alan hope your well,

I have been conversing with George Todd recently, he has now agreed to post and make a contribution to our site, I have been pestered the life out of him to do this - so now that he has agreed lets strike while the iron is hot, please can you send him a link and password for him to log into our forum, he has been on to look and posted me this evening to say he will prepare something, sorry but i was aware your also on his circle of friends list, he has suggested a book to me to read, I will forward the details once i have read it.

Out of interest he tells me he is a very young 86 about the same age as our John bass.

Best regards

Derek Betts

evening alan, 175 cc rules... is removing 10mm from the top of a standard cast barrel against the rules...

No Problem at all Nobby, it is a usual modification and is forced on us anyway as we can not use standard parts. The look of the barrel is not changed externally.
Cheers,
Alan

thanks for the reply alan...hope your well and seasonal greetings to you and family..

Thanks Nigel,
Not having a good time just of late, the scaffolding in my back doesn't seem to like the cold weather much! It should be good to get out in the sun in the new season, even if I can't ride!
See you at Mallory
Alan