KZ 750 twin newbie question

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01 Aug 2020 11:11 #832019 by eddkz750
KZ 750 twin newbie question was created by eddkz750
Hi, I am having a LOT of trouble getting the front lower engine mount bolt to break free. I have the nut off, but cannot get the bolt to move. I was going to use a torch to heat up either the frame mounts or the engine itself. this is my question. should I heat the frame or the engine?

Any guidance would be appreciated.

Thanks and glad I found kzrider,com

Ed

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01 Aug 2020 15:26 - 01 Aug 2020 15:27 #832045 by krazee1
Replied by krazee1 on topic KZ 750 twin newbie question
Do you have the remaining engine mount fasteners loose? If so you should be able to wiggle the engine a bit and relieve the bind on the bolt you're trying to remove.

Mike

Former M.E. at Kawasaki Motors Manufacturing, Lincoln, NE
1966 W1 (the Z1 of 1966-50H.P. and 100mph!)
1974 Z1
1978 KZ1000 LTD
1976 KZ900B pile O parts
1980 KZ750E
1980 Honda XL250S (I know, wrong flavor!)
Last edit: 01 Aug 2020 15:27 by krazee1.
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  • DoctoRot
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02 Aug 2020 12:23 - 02 Aug 2020 12:25 #832110 by DoctoRot
Replied by DoctoRot on topic KZ 750 twin newbie question
Use a drift to tap it out, if it still won’t ‘budge hit the cases with some heat. Lots of penetrating oil won’t hurt either.
Last edit: 02 Aug 2020 12:25 by DoctoRot.
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02 Aug 2020 13:09 - 02 Aug 2020 13:10 #832113 by 650ed
Replied by 650ed on topic KZ 750 twin newbie question

eddkz750 wrote: Hi, I am having a LOT of trouble getting the front lower engine mount bolt to break free. I have the nut off, but cannot get the bolt to move. I was going to use a torch to heat up either the frame mounts or the engine itself. this is my question. should I heat the frame or the engine?

Any guidance would be appreciated.

Thanks and glad I found kzrider,com


Ed


Soak it with Kroil for a couple days and it should move without too much difficulty. Ed


1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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Last edit: 02 Aug 2020 13:10 by 650ed.
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03 Aug 2020 06:47 #832140 by eddkz750
Replied by eddkz750 on topic KZ 750 twin newbie question
I tried a brass punch and it still would not budge

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03 Aug 2020 06:50 #832141 by eddkz750
Replied by eddkz750 on topic KZ 750 twin newbie question
Thank you all for your replies, I have tried a brass punch (still did not move). I will try removing all other bolts and moving the engine to free it up (one day this week).

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03 Aug 2020 07:35 - 03 Aug 2020 07:54 #832142 by martin_csr
Replied by martin_csr on topic KZ 750 twin newbie question
Instead of removing all of the other bolts, maybe try just loosening them.
Is the engine blocked or is its full weight still on the frame?
Last edit: 03 Aug 2020 07:54 by martin_csr.

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03 Aug 2020 18:44 #832180 by krazee1
Replied by krazee1 on topic KZ 750 twin newbie question

martin_csr wrote: Instead of removing all of the other bolts, maybe try just loosening them.
Is the engine blocked or is its full weight still on the frame?


Good thought! ( see first reply)

Mike

Former M.E. at Kawasaki Motors Manufacturing, Lincoln, NE
1966 W1 (the Z1 of 1966-50H.P. and 100mph!)
1974 Z1
1978 KZ1000 LTD
1976 KZ900B pile O parts
1980 KZ750E
1980 Honda XL250S (I know, wrong flavor!)

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10 Aug 2020 06:44 #832544 by usa forever
Replied by usa forever on topic KZ 750 twin newbie question
Seafoam deep creep is an excellent oil to use. I usually let that set for a day or two soak it up again and hit it with a heat gun or a hair dryer we can't do much damage with that and it will create a little wiggle then you can work it back and forth quarter-turn at a time hopefully

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