Author Topic: HELP  (Read 3191 times)

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BruLan

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Reply #30 on: September 17, 2023, 10:03:07 pm
Postcode here, use AA Route Planner!

https://www.dellorto.co.uk/contact-us/

Joking aside, the former UK importers of Chennai's finest chose the Dell'Orto PHF32 for the heart of their Go-Slightly-Faster kit for the lean burn Electra-X, which is quite a sporty carb for any Bullet. Drop me a PM, it might be to your advantage.

The VM28 Mikarb, which as you have probably worked out by now is a sort of Mikuni VM copy, CAN be persuaded to work well, as you're finding out, though I think the Sixty-5s were jetted quite lean to get them through the Euro 2 emissions regs, hence Hitchcocks' little jetting-up guide to get them working better. 28mm is the same size bore as the 1⅛" Amals the UK built 500 Bullets had in the mid-1950s.

The other issue seems to be with the mounting on later Indian 500s, the two-piece alloy manifold and rubber hose connector move the carb back a way so that the carb top and throttle cable run all get rather too close to the underside of the tank instead of nestling in the tank cut-out which was originally designed to allow for this. If you can find a one-piece plate manifold flange rubber thingy with mounting stud centres at 58mm to take the 35mm stub of the Mikarb, that's one less hose clip to worry about and a bit more room to fiddle with carb tops when cable fitting. If not, you can get these with 60mm centres easily enough, 5 minutes with a rat-tail file will make it usable.

A.

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On the upward path of a learning curve


allanfox

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Reply #31 on: September 18, 2023, 10:54:41 am
Postcode here, use AA Route Planner!

https://www.dellorto.co.uk/contact-us/

Joking aside, the former UK importers of Chennai's finest chose the Dell'Orto PHF32 for the heart of their Go-Slightly-Faster kit for the lean burn Electra-X, which is quite a sporty carb for any Bullet. Drop me a PM, it might be to your advantage.

The VM28 Mikarb, which as you have probably worked out by now is a sort of Mikuni VM copy, CAN be persuaded to work well, as you're finding out, though I think the Sixty-5s were jetted quite lean to get them through the Euro 2 emissions regs, hence Hitchcocks' little jetting-up guide to get them working better. 28mm is the same size bore as the 1⅛" Amals the UK built 500 Bullets had in the mid-1950s.

The other issue seems to be with the mounting on later Indian 500s, the two-piece alloy manifold and rubber hose connector move the carb back a way so that the carb top and throttle cable run all get rather too close to the underside of the tank instead of nestling in the tank cut-out which was originally designed to allow for this. If you can find a one-piece plate manifold flange rubber thingy with mounting stud centres at 58mm to take the 35mm stub of the Mikarb, that's one less hose clip to worry about and a bit more room to fiddle with carb tops when cable fitting. If not, you can get these with 60mm centres easily enough, 5 minutes with a rat-tail file will make it usable.

A.
This is the one for the PHF32 with the AVL head, to be honest not fitted the PHF yet but it is the right one with a bit of hole centre filing.

https://www.malossistore.com/en/it/rubber-straight-intake-manifold-32x44-for-phf-phbe-32-b-kawasaki-900-1000-2-3-cylinder-02_1135-P



stinkwheel

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Reply #32 on: September 18, 2023, 05:03:02 pm
Try a mikuni VM28-200 plate manifold/flange adapter. Should bolt straight on with no alteration.

You may need to use nuts with a reduced hex size so they don't foul the jubilee clip with the points. You can readily buy JIS M8 nuts which have a 12mm hex, they are commonly fitted to Japanese bikes.