when cluch pedal puched in motor loads up and stalls .spent last night pulling clutch apart FOUND NOTHING.put back together stared mini ran fine .pushed clutch perect repeted and stalled again . anyone have any ideas

Replace the clutch hose, it's acting as a check valve (not letting fluid back) so when you push again, clutch assembly goes in further, loads up against the 3 flywheel stops, and it stalls the motor.
Mind you for this to happen, the 2 stop nuts against the clutch cover must be screwed out too far, or they are missing.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

crank thrust bearings, check end float

Get someone to watch the crank pulley when you push the clutch in...
A little bit of endfloat is normal (might be up to .015" in a worn motor) but if it's moving 1mm or more, the thrust washers are worn out.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

just tried cluth again .clutch realeses perfect motor loads up even at part movement how ever noticed dropgears or someother part starts to rattle when pedal is pushed .could it be in gearbox .can start in gear (no clutch) and drive






















0 and drive

Maybe the clutch thrust/throw out (whatever you want to call it) bearing requires replacing as its not spinning freely

Yeah I was going to suggest that might be seized, but the OP said he had all the clutch out, and was fine...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

the noise might be the crank webs hitting if the thrusts are worn out.???

More likely `dropped out' before this happens...

Morris 1100 found them laying in the box on one of his spare motors.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

the motor a 1430 is lucky to have done 2000 k including gearbox(3sincro stait cut gears) cheked endfloat aprox 15thou

there sounds like a crank-thrust problem to me

there are some bad (ombinations of cranks & thrusts out there that allow some "pinch" (for want of a better description) on the thrusts into the edge/radius of the crank main-journal

if not sorted then this particular problem will act as tho the thrusts are fitted the wrong way around & grab-up the crank with the foot on the clutch

i`d be ripping it all apart if it were mine

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

I'd also be careful not to have too little endfloat.. the .003" spec in the manuals is BS for any 1275 that's going to be revved hard. These cranks flex at high rpm and can grab the thrusts if insufficient clearance. I have a run pair of centre main shells to prove it...
All good now, .007" endfloat works just fine.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I'll put my money on the thrust washer still. About a million years ago before I was a mechanical genius, I sent a 1275 (1100S) motor to Repco to get rebuilt. It came back with no thrust washers, which I rectified before fitting to clutch/box parts, only to find after fitting head and puting push rods in, they'd put cam followers in upside down.

Yes I did complain and they supplied me a new conversion kit and T/C gaskets.

Get someone to press the clutch pedal while you observe the crank shaft Pulley (Harmonic Balancer) see if it comes forward when pedal is depressed. Good luck.

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DID I MENTION THAT I AM THE BEST SUPPLIER FOR MINI ELECTRICAL PARTS AND REPAIRS?
"Let us remove your "SHORTS"

It's over throwing, you're trying to push the crank in to the radiator. Fit the Over-throw nut and lock nut or if fitted, adjust them.

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