KZR's Bikes of the Month for 2024

1981 Kawa 650 (With 750 engine)

  • gordone
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10 Jan 2017 10:14 #751869 by gordone
1981 Kawa 650 (With 750 engine) was created by gordone
I have bought bike I want to build to a cafe racer, have some fun project for some winters, no stress, working in the winter and driving in the summer :)

I have started to clean and rebuild the carbs, want to make sure it working 100% techincal, before I start to rebuild the look.

I have started to looking for seat, do you have any site/webpage you recommend for bying seat, good quality?

Thank you.

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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10 Jan 2017 11:54 #751880 by rstnick
Replied by rstnick on topic 1981 Kawa 650 (With 750 engine)
Looking forward to your project.
Check out the Do The Ton Café site.
Lots of links to parts suppliers.

www.dotheton.com/forum/index.php

Rob
CANADA

Need a key for your Kawasaki? PM me

1978 KZ650 C2, 130K kms, Delkevic ex, EI, CVK32, PMC easy clutch, ATK fork brace, steering damper, braced swingarm, ZRX shocks, 18" Z1R front wheel.
2000 ZRX1100
2011 Ninja 250R - Wife's
2005 z750s (aka GPz750)
1978 KZ1000 project

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10 Jan 2017 13:16 - 11 Jan 2017 06:22 #751896 by martin_csr
Replied by martin_csr on topic 1981 Kawa 650 (With 750 engine)
If you just want a seat cover, here's one I'm thinking of getting. It has Kawasaki stenciled on the rear, similar to the stock seat. I already recovered a spare 750 Ltd seat w a nos Travelcade/saddlemen/saddle-skins seat cover which is now on the bike, but I'd like to put the original seat back on the bike w the stenciled cover. Recovering a seat is kind of a pain, but doable.

eb --- Motorcycle seat cover - Kawasaki KZ650CSR --- UK seller ... probably available on eb UK
Last edit: 11 Jan 2017 06:22 by martin_csr.

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10 Jan 2017 14:42 #751910 by rrsmsw9999
Replied by rrsmsw9999 on topic 1981 Kawa 650 (With 750 engine)
I forget the seller on ebay but he makes a lot of vintage covers. 35$. If you want the name I can look it up, but the product was A++++, nice supple thick padded codura vinyl. Stitching and fit was perfect. A tip I would say is if your seat pan has any damage get a metal upholstery rail to rivet to the pan. The old tines even when not rusted will be brittle and weak. Most times the stock foam and pans are fine for reworking with upholstery. R

1980 KZ 1000E2
Crashed 6/2016

1980 KZ550A
Sold 3/2016
The following user(s) said Thank You: GPz550D1

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10 Jan 2017 19:40 #751924 by kaw-a-holic
Replied by kaw-a-holic on topic 1981 Kawa 650 (With 750 engine)
These are great guys to deal with. Even if you don't buy from them you may find some inspiration for a DIY project.

www.dimecitycycles.com/motorcycle-parts/...13.html?cat=2218&p=1

Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project
The following user(s) said Thank You: GPz550D1

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  • gordone
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12 Jan 2017 09:43 - 12 Jan 2017 09:47 #752013 by gordone
Replied by gordone on topic 1981 Kawa 650 (With 750 engine)
No eBay APP ID and/or Cert ID defined in Kunena configurationThank you all for the information, have not found the look I want for my bike, I`m looking at pictures, but for the seat I think I want to have something like these :

temp.dynamitt.net/div/MC/01.JPG



I`m open for inputs, don`t think I want to have the orginal seat.

I can see people ar cutting of the frame behind and welding new 180 degress bend ?

Some hind the battery inside the end of the seat ?

When I`m looking at pictures of cafe racers I often don`t see the tag plate .... I need to have it :)

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine
Last edit: 12 Jan 2017 09:47 by gordone.

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13 Jan 2017 15:32 #752144 by gordone
Replied by gordone on topic 1981 Kawa 650 (With 750 engine)
While I`m waithing for parts to rebuild the carbs have I today done a compressor test and valve clearance measurements.

C1 = 6.2 bar = 90 psi
C2 = 6.2 bar = 90 psi
C3 = 5.8 bar = 84 psi
C4 = 6.3 bar = 91 psi

Valve 1 = 0,25 mm
Valve 2 = 0,30 mm
Valve 3 = 0,15 mm
Valve 4 = 0,15 mm
Valve 5 = Was not able to get 0,15mm in.
Valve 6 = 0,20 mm
Valve 7 = Was not able to get 0,15mm in.
valve 8 = 0,10 mm

What do you think about the test results ?

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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13 Jan 2017 15:50 - 13 Jan 2017 21:31 #752146 by JR
Replied by JR on topic 1981 Kawa 650 (With 750 engine)
Low compression figures.
Was the engine warm and did you hold the throttle wide open ?

On my 1980 750/4 the valve clearances should be 0.08 to 0.18mm (.003 to .007 inches I think) so most of those measurements you posted would be way out.
What does your manual say?

1980 kz750E1, Delkevic exhaust
Last edit: 13 Jan 2017 21:31 by JR.

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13 Jan 2017 16:24 #752148 by 650ed
Replied by 650ed on topic 1981 Kawa 650 (With 750 engine)

gordone wrote: While I`m waithing for parts to rebuild the carbs have I today done a compressor test and valve clearance measurements.

C1 = 6.2 bar = 90 psi
C2 = 6.2 bar = 90 psi
C3 = 5.8 bar = 84 psi
C4 = 6.3 bar = 91 psi

Valve 1 = 0,25 mm
Valve 2 = 0,30 mm
Valve 3 = 0,15 mm
Valve 4 = 0,15 mm
Valve 5 = Was not able to get 0,15mm in.
Valve 6 = 0,20 mm
Valve 7 = Was not able to get 0,15mm in.
valve 8 = 0,10 mm

What do you think about the test results ?


Please describe how you did the compression test. It should be done with all spark plugs out; the engine warmed up to normal operating temperature (the pistons are tapered toward the top and must be warmed up to expand); throttle wide open; fully charged battery; etc. Ed

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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  • gordone
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14 Jan 2017 03:17 #752167 by gordone
Replied by gordone on topic 1981 Kawa 650 (With 750 engine)
Hi,
The carbs is not mounted, all sparks plugs what out.
I attached the compression tester to each cylinder and let the start motor run until the pressure was not increasing any more.

The motor was cold duo to rebuild the carbs...
So cold motor has a big impact ? I must then re test when I got my carba installed again.

Thank you for your inputs.

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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14 Jan 2017 05:09 - 14 Jan 2017 05:10 #752170 by Nessism
Replied by Nessism on topic 1981 Kawa 650 (With 750 engine)
Those compression numbers are low but you have a bunch of tight valves so that isn't helping. Also understand that often times the compression will be low on an engine that has been sitting for some time. I'd adjust the valves, clean the carbs, and get the bike running. Then give the bike an Italian Tune Up for a few hundred miles and then check compression again. Dollars to donuts the compression numbers improve.
Last edit: 14 Jan 2017 05:10 by Nessism.

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14 Jan 2017 16:49 #752203 by gordone
Replied by gordone on topic 1981 Kawa 650 (With 750 engine)
Thank you for inputs, yes I cleanred the gas tank today. Have ordered part for the carbs, so while waiting for parts for the carbs I will focus on the valves, I need to read more to see if I have mesaure correct and also learn how to adjust them :)

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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