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Messages - Oggers

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91
British Bikes / Re: 66 Bonneville
« on: September 12, 2018, 03:16:17 PM »
Hmmmm....Forgive me for a supremely dim response, but is it feasible to fit a T140 head on a T120 barrel from a 66? Fairly sure I have a T140 head as I have the 2 siamesed rocker covers - Not sure what I now have for the barrel!


92
British Bikes / Re: 66 Bonneville
« on: September 11, 2018, 04:11:30 PM »
Quite right,  typo by me  - number is DU40025 which corresponds to 1966. No stampings - too early for those. The question about the head was more of a concern than an argument for increased power. I believe it was like that when the engine was rebuilt - meticulously rebuilt from what I read in the extensive report.

I'll check out if the pressure plate is still spinning when clutch is in through the cover in the PCC - thanks for that tip. I guess if it is spinning I adjust at the bars or at the rod threaded end c/w lock nut.

Rest of the bike appears spot on - Boyer, Devon rims, fresh pistons, new paint job etc. Handles very well, engine still a wee bit tight perhaps.

Only other issue is the rear brake rod is fully wound in - with the actuating lever at vertical, and about 6 inches of threaded rod protruding - which seems odd. Either shoes are well worn or the hub has been over-skimmed....thoughts welcome.       

93
British Bikes / 66 Bonneville
« on: September 11, 2018, 10:49:29 AM »
Chaps

New to this forum so please be gentle.... I am fortunate enough to have acquired a 66 Bonneville and would very much appreciate the advice of those who know better on a few points outlined below.

The bike has been fitted with a T140 head. Is this a retrograde step or is it advantageous in some way? Larger valves perhaps?

PCC has the breather tube fitted. I understand these were not fitted until 1970 - could this therefore be a retrofit? Engine/frame number is 400025 - which is a 66.

Gearbox is somewhat "crunchy" but then the bike has only done 500 miles since a full rebuild of the engine and box. Is it worth changing the gearbox oil, and adjusting the clutch rod end via the PCC. Any other tips to achieve a smoother change appreciated.

Carbs. are Amal concentrics - should be monoblocs I think for a 66. Again is this a big deal?

Very many thanks

Mark



   

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