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Mongrel motor


cullinoc

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Posted

Building motor with what I have left lying about  garage 

1127 lightened and balanced crank new shells

New camchain

Bandit 1200 Crankcasses 

1127 gearbox rebuilt new bearings 

Rebuilt polished oil pump

Bandit 1200 pistons +barrels 

Mint flowed dot head

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  • Like 7
Posted (edited)

That's no mongrel, that's a monster!  Really nice combination of parts, should be a fantastic engine (y)

Combine it with a 1052 clutch and it's pretty much my ideal engine :D (y)

What clutch are you planning to go with? "Top-hat" style from the earlier 1052, or diaphragm clutch from the 1127?


Regarding the chain, I'll echo what @FJDmentioned above, have you already got the tensioner installed in the back of the barrels? If so you'll quite possibly be fighting against it :)

Edited by Devilman
Posted
9 hours ago, cullinoc said:

Got a question for anyone that have built a motor with dot head how big did yous make spacers for chain runner

Cheers Barry 

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Not using 750 cam sprockets are you ? 

 

Posted
18 hours ago, Duckndive said:

Not using 750 cam sprockets are you ? 

 

The cams never had any sprockets on when I got head 

Had few 1100 lying about so that's what's on cams .can 750 ones be used ? Got load of slabby 750 cams and sprockets could sprockets be used from any of ?them

Posted
20 minutes ago, cullinoc said:

The cams never had any sprockets on when I got head 

Had few 1100 lying about so that's what's on cams .can 750 ones be used ? Got load of slabby 750 cams and sprockets could sprockets be used from any of ?them

No you need 1100 ones

That's why I asked as 750 ones have more teeth which would explain the idler not sitting down......are you sure the chain is correct for a 1127 motor ...

  • Like 2
Posted (edited)
2 hours ago, Duckndive said:

No you need 1100 ones

That's why I asked as 750 ones have more teeth which would explain the idler not sitting down......are you sure the chain is correct for a 1127 motor ...

Defo New 122 link chain 1100 sprockets, adjuster fully out ,

Edited by cullinoc
Posted
On 10/27/2022 at 7:47 PM, Duckndive said:

No you need 1100 ones

That's why I asked as 750 ones have more teeth which would explain the idler not sitting down......are you sure the chain is correct for a 1127 motor ...

The 750 ones have only 30 teeth 1100 has 34 teeth 

  • Like 2
Posted

@Ted MYou might have something there! I’ve had the camchain appear too short, only to find the chain was located on the front and rear of the  crank sprocket, with a lump of slack chain hanging below it. Put my hand through the chain, and turned the engine over by hand. Job jobbed!

  • Like 1
Posted
On 10/26/2022 at 2:44 PM, cullinoc said:

Got a question for anyone that have built a motor with dot head how big did yous make spacers for chain runner

Cheers Barry 

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I didn't need any spacers when I fitted a dot head to a 1052 motor. 

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