Author Topic: Unlocking a motor  (Read 2343 times)

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Offline bazza

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Re: Unlocking a motor
« Reply #15 on: October 29, 2018, 02:43:44 PM »
COKE   the fizzy type not the powder. Some articles on google, they also say after soaking use high compressed air to move rings, Mike
« Last Edit: October 29, 2018, 02:54:36 PM by bazza »
Once you go black  you will never go back - allblacks
Maico - B44 -1976 CR250- 66 Mustang YZF450,RM250
Embrace patina

Offline tony27

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Re: Unlocking a motor
« Reply #16 on: October 29, 2018, 04:51:50 PM »
Would have thought coke would attack the piston but it's worth a shot. Going to measure the cylinder properly & confirm it's condition is as good as my initial measurement suggested

Offline Matador107

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Re: Unlocking a motor
« Reply #17 on: October 29, 2018, 10:09:08 PM »
50 per cent acetone and auto transmission fluid as a penetrate or diesel, my favourite and cheap.

To clean the carbon try some of that spray on foaming  alloy wheel cleaner, it easily moves baked on brake dust but I would watch it though.
Wanted to buy a CZ back in the day, $1000 in a crate with spare wheels and engine parts plus plus.
Father put a stop to that big time.
Bultaco Metralla, Matador MK 5, Montadero mk2, El Bandido model 18,plus lots of bits and two Honda XR's 250,350.

Offline 80-85 husky

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Re: Unlocking a motor
« Reply #18 on: October 30, 2018, 01:02:11 PM »
a great outcome from what appeared to be a total rebuild, got to have a win sometimes...

Offline tony27

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Re: Unlocking a motor
« Reply #19 on: October 30, 2018, 05:34:35 PM »
Definitely good to have a win.
Had the crank split today & the pin looks good, not so good news for the rod but I'm pretty sure the rod out of the motor that had damaged pin & roller is good. No rod kits here in NZ at the moment & it sounds like they might be in short supply in the states at the moment so I'll need to get 1 out of Europe.
I'm dropping the cases off tomorrow for vapourblasting & will have to see if I can find a spacer for between the main bearings as that was missing, all going to plan I should have the motor back together by the end of the year.
I talked to Steve Roberts this afternoon about straightening out the bent rear frame tubes & once I've stripped the rest of the bike down I'll take the frame over to him