Gpz 750 head is bowed slightly

  • jenningsjesse
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05 Jul 2017 19:54 #766185 by jenningsjesse
Replied by jenningsjesse on topic Gpz 750 head is bowed slightly
These motors don't have bearings

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05 Jul 2017 20:03 #766186 by jenningsjesse
Replied by jenningsjesse on topic Gpz 750 head is bowed slightly
N1
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05 Jul 2017 20:09 #766187 by jenningsjesse
Replied by jenningsjesse on topic Gpz 750 head is bowed slightly
It's titled as an 83, but motor and frame Vins all match and say 1982 N1, not N2 like the 83. Pretty sure this is a Gpz N1 motor.
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  • SWest
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05 Jul 2017 20:14 #766190 by SWest
Replied by SWest on topic Gpz 750 head is bowed slightly

jenningsjesse wrote: These motors don't have bearings


I know that, I just want to see if there is uneven wear or scoring.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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05 Jul 2017 20:39 #766191 by jenningsjesse
Replied by jenningsjesse on topic Gpz 750 head is bowed slightly
Might just buy a different head and say f it. Still going to see if it can be straightened and used. Does look like exhaust valve seats are awfully shallow and some scoring in journals and caps. Found this on eBay. When I just put in kz 750 head much more options. I didn't think all 750 heads were interchangeable though? Let's not say things unless it's a fact, and lead people to buy and build the wrong thing. ;)

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05 Jul 2017 20:47 #766192 by jenningsjesse
Replied by jenningsjesse on topic Gpz 750 head is bowed slightly
Some of those replies are to Scott, hope we're not getting confused Steve. If so, sorry. I maybe will just get a different head. Whole nice heads with cams for $200. And deal with this head later.
The following user(s) said Thank You: SWest

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05 Jul 2017 21:19 #766193 by Nessism
Replied by Nessism on topic Gpz 750 head is bowed slightly
You need a later head with the bathtub combustion chamber. The earlier E and H model heads are different. If I were you I'd call APE first and find out how much they would charge to straighten yours. It may well be cheaper than purchasing a used in unknown condition. Your head looks to be in pretty nice shape overall.
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread

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05 Jul 2017 21:49 #766194 by jenningsjesse
Replied by jenningsjesse on topic Gpz 750 head is bowed slightly
Thanks for that info was just researching. And yes I agree, I think it can be made serviceable. I am going to call them for a quote tomorrow, but sending it to a machine shop 2hrs away through Arnold Motor Supply that specializes in small engine head and machine work for free shipping, and a quote, to start. Sending all valves cams etc with, with service limits written down.

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05 Jul 2017 22:35 #766196 by jenningsjesse
Replied by jenningsjesse on topic Gpz 750 head is bowed slightly
So is mine a Spectre motor? What's the differences between that and Gpz. Thought they put the gpz motors and heads in these? My head looks like a Gpz. 81 N1 750 I know for sure on vin. Carbs are all black too. Head and rest of motor in gold.

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06 Jul 2017 02:47 #766200 by Nebr_Rex
Replied by Nebr_Rex on topic Gpz 750 head is bowed slightly
Spectres are the same as the '82 GPz750 except for shaft drive and color.


.
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected

www.dotheton.com/forum/index.php?topic=39120.0


.

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06 Jul 2017 06:48 #766220 by jenningsjesse
Replied by jenningsjesse on topic Gpz 750 head is bowed slightly
Talked to ape and they said you just put it back together and they pull back down. Can't heat to straighten them or anything.i was thinking that myself. Good to know.

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06 Jul 2017 08:21 #766227 by Nessism
Replied by Nessism on topic Gpz 750 head is bowed slightly
APE sells some HD studs and nuts so you can over torque some. They may be a good investment.
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread

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