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91
Clutch, Primary, Gearbox / Re: a65 triplex chain
« Last post by ironhead on 16.05. 2019 08:00 »
G'day all
The spline & 2 half clips is a good set up. Commando's use this exact set up with no problems ( twice the horsepower & heavier clutch) The nut needs to be tightened firmly, not so tight the circlips get deformed.
Id put a Commando clutch in the plunger tomorrow if I could shrink it to fit inside the primary case. *work*
92
Amal, Carburation / Re: Road rocket problems
« Last post by ironhead on 16.05. 2019 07:45 »
G'day orabanda & swarfy.
Not the float needle, the jet block ( venturi) holder. It pushes out when the small locating screw on the r/h side &
big nut on the bottom of the main carby body is removed. This has a fibre washer & will cause richness if it doesn't seal properly.
93
Clutch, Primary, Gearbox / Re: Clutching at straws
« Last post by Sav on 16.05. 2019 07:38 »
Cable ties! Have the same problem on my M23 and could not find the lever on one occasion.

Small cable tie around the lever doesn't look too unsightly and loosely loop it to the frame or whatever is convenient.

 Lever has not fallen off since!
94
Amal, Carburation / Re: Road rocket problems
« Last post by Swarfcut on 16.05. 2019 07:24 »
Bazza.. There is another carbon brush under the pan head slotted screw adjacent to the magneto name plate. This is the earth return between the armature and body. Worth checking as failure here can give all manner of erratic running. The later steel points backplate does not have its own  carbon brush and relies solely on this brush for the earth return. This is why some brass points plate have their own brush, some don't. Its a case of belt and braces, or just a belt. Not saying this is the answer, but something else to consider.

 Anything which alters the height of the needle jet in relation to the fuel level needs careful scrutiny. The jet block needs to be seated fully. Check the parts are the right ones for your carby, and the basic assembly is correct, as in the parts diagram, regarding the position of any sealing washers.

 Swarfy.

 

 
95
Amal, Carburation / Re: Road rocket problems
« Last post by barry2 on 16.05. 2019 06:54 »
Hi Mates
Thanks for the tips ,,I did check the fuel level, was spot on, going put the needle where it was ( correct  position)
Barry
96
Clutch, Primary, Gearbox / Re: a65 triplex chain
« Last post by Swarfcut on 16.05. 2019 06:53 »
    CJ... You are probably correct. I did not suggest the angle of taper was the same, for all models and years from way back (someone else did) but experience here would indicate that the later triplex A65 Clutch can be mated successfully to a standard A10 mainshaft.

 My comments on the Plunger Clutch were to show the inherent weakness of an otherwise excellent design, which is a possible reason why BSA went back to the taper shaft design for the S/A models.

 

 Swarfy.
97
Amal, Carburation / Re: Road rocket problems
« Last post by orabanda on 16.05. 2019 05:09 »
not so sure about the needle jet holding block requiring a fibre washer?
Although the parts list shows one, I have found the float level is usually too high. Removing the washer brings the level lower (to the level of the dimple on the outer cover).

Richard
98
Amal, Carburation / Re: Road rocket problems
« Last post by ironhead on 16.05. 2019 04:45 »
Hi Barry.
Float level may be a bit high. If an engine idles good when cold it usually means its too rich.
Also maybe check the needle jet holding block, there should be a fibre washer under it. Make sure the small locating screw on the r/h side is not binding the block & stopping it seating properly.
99
Amal, Carburation / Road rocket problems
« Last post by barry2 on 16.05. 2019 02:04 »
Hi mates
This is a continuing problem Ive been having ,but will start afresh
Road Rocket w/- super engine was running too rich, was starting Ok  but was surging a bit, so  fitted a new needle/ needle  jet, still rich,  so dropped the needle a notch, now on the lowest /the first time I too it out was missing  at pilot / needle jet change over  but not all the time and ran well most of the time , but acc' missed a bit , Yesterday morning flooded the "Monoblock" but wouldn't start after good hard kicks , thinking too much fuel held the throttle about 1/2 open after 1 or 2 kicks it started rough/missing etc but but settled down to ok tickover, rode quite well but with acc' missing, went about 10 kms , stopped for about 1/2 hour, this time no flooding to start, still hard to to start till I opened throttle wide open then missing till settled down, went fine on the freeway from low down to flat out,, had the colourtune on it fine at tick over , i also took the plug leads off in turn each and cylinder ticked over fine on each cylinder , but sometimes the tick over is erratic but not always ,,, The engine is still running rich but not as bad
Been right thru the magneto plugs / leads / pick up / brushes etc great spark and no arcing at the points , I did take the slide block out before maybe I stuffed up w/- that, if it wasn't for the hard starting I could put up w/- it any thoughts P/S do they have a brush behind the points plate?  mine didn't I put one in ,, it didn't help
Barry
100
Clutch, Primary, Gearbox / Re: a65 triplex chain
« Last post by chaterlea25 on 15.05. 2019 22:13 »
Hi All,
Swarfy, I have to disagree about the tapers? the unit A50/65 are different to the older BSA stuff,
A65 and Triumph tapers are the same
To fit the A65 clutch on an A10 a 4 spring shaft adaptor is needed

John
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