1
CZ / Re: 1973 PARTS BOOK
« on: March 19, 2024, 06:59:19 PM »
I have made a copy from the 1974 original parts book - if you would like let me know - i tried putting it here but it wouldn't stick. Kind regards Pete
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2
CZ / Re: 981 Clutch oil seals and tank colour and JETS
« on: March 19, 2024, 06:53:17 PM »
Improved again.
50 pilot and 300 main and then raised the needle one step by dropping the clip one grove down from the middle groove....
Cheers
Pete
50 pilot and 300 main and then raised the needle one step by dropping the clip one grove down from the middle groove....
Cheers
Pete
3
CZ / Re: 981 Clutch oil seals and tank colour and JETS
« on: January 27, 2024, 01:35:12 PM »
27..01.24 jetting changed which improved it a lot.
Original 25 pilot changed to the 37.5 and now a 45. Great improvement.
After that it was still prone to increased revs by itself just above quarter throttle.
So left the Q5 in and replaced the 6F5 needle with a 6FJ6 (both middle clip) No more self over rev.
Ridden around street, hot, but will need to get a track day to maybe increase the Main from the 280. See how we go.
Cheers
Pete
Original 25 pilot changed to the 37.5 and now a 45. Great improvement.
After that it was still prone to increased revs by itself just above quarter throttle.
So left the Q5 in and replaced the 6F5 needle with a 6FJ6 (both middle clip) No more self over rev.
Ridden around street, hot, but will need to get a track day to maybe increase the Main from the 280. See how we go.
Cheers
Pete
4
CZ / Re: 981 Clutch oil seals and tank colour
« on: January 21, 2024, 02:23:44 PM »
JET SPECS TAKEN FROM SPREADSHEET PROVIDED IN THIS THREAD
CZ 125 MX -72 VM 32 200 35 Q6 5FJ9 - 3.0
CZ 250 MX -66 VM 32 240 35 Q6 6FJ6 - 3.0
CZ 250 MX -66 VM 34 230 35 Q8 6FJ6 - 3.0
CZ 250 MX -71 VM 34 210 35 Q5 6DP5 -
CZ 250 MX -72 VM 34 240 40 Q8 6FJ6 - 3.0
CZ 250 MX VM 34 210 35 Q5 6DP5 -
CZ 250 MX VM 36 260 35 Q5 6FJ6 - 1.5
CZ 250-380 MX VM 34 300 40 Q6 6FJ6 - 2.5
CZ 250-380 MX VM 34 310 45 P8 6DH3 -
CZ 360 MX -67 VM 34 250 35 Q6 6DP5 -
CZ 360 MX -67 VM 34 230 45 Q6 6F5 - 2.
CZ 360 MX -67 VM 34 240 40 Q8 6FJ6 - 2.5
CZ 380 MX TM 36 290 45 Q6 6FP17 -
CZ 400 MX VM 34 230 30 Q5 6DP5 -
CZ 400 MX VM 36 280 25 Q5 6FJ6 - 2.5
CZ 380 MX VM 36 350 45 Q8 6FJ6 - 1.5
CZ 380 MX VM 34 320 45 P8 6DH3 -
CZ 380 MX -66 VM 34 260 35 P0 6DH3 - 2.5
CZ 380 MX -69 VM 34 320 45 P8 6DH3 - 2.5 O. Persson
CZ 380 MX -71 VM 34 230 30 Q5 6DP5 - 2.0 AMS Racing USA
CZ 380 MX -72 VM 36 290 45 Q5 6FJ6 - 2.0 R.L Dengler
CZ 380 MX -72 VM 36 270 45 Q6 6DH2 3.5 Pete Maly specs
CZ 380 MX Reed Valve VM 36 430 45 Q8 6DH3 - 2.5 C.M.
CZ 125 MX -72 VM 32 200 35 Q6 5FJ9 - 3.0
CZ 250 MX -66 VM 32 240 35 Q6 6FJ6 - 3.0
CZ 250 MX -66 VM 34 230 35 Q8 6FJ6 - 3.0
CZ 250 MX -71 VM 34 210 35 Q5 6DP5 -
CZ 250 MX -72 VM 34 240 40 Q8 6FJ6 - 3.0
CZ 250 MX VM 34 210 35 Q5 6DP5 -
CZ 250 MX VM 36 260 35 Q5 6FJ6 - 1.5
CZ 250-380 MX VM 34 300 40 Q6 6FJ6 - 2.5
CZ 250-380 MX VM 34 310 45 P8 6DH3 -
CZ 360 MX -67 VM 34 250 35 Q6 6DP5 -
CZ 360 MX -67 VM 34 230 45 Q6 6F5 - 2.
CZ 360 MX -67 VM 34 240 40 Q8 6FJ6 - 2.5
CZ 380 MX TM 36 290 45 Q6 6FP17 -
CZ 400 MX VM 34 230 30 Q5 6DP5 -
CZ 400 MX VM 36 280 25 Q5 6FJ6 - 2.5
CZ 380 MX VM 36 350 45 Q8 6FJ6 - 1.5
CZ 380 MX VM 34 320 45 P8 6DH3 -
CZ 380 MX -66 VM 34 260 35 P0 6DH3 - 2.5
CZ 380 MX -69 VM 34 320 45 P8 6DH3 - 2.5 O. Persson
CZ 380 MX -71 VM 34 230 30 Q5 6DP5 - 2.0 AMS Racing USA
CZ 380 MX -72 VM 36 290 45 Q5 6FJ6 - 2.0 R.L Dengler
CZ 380 MX -72 VM 36 270 45 Q6 6DH2 3.5 Pete Maly specs
CZ 380 MX Reed Valve VM 36 430 45 Q8 6DH3 - 2.5 C.M.
5
CZ / Re: 981 Clutch oil seals and tank colour
« on: January 21, 2024, 02:05:13 PM »
Hi Tony, Just back from overseas and see your last post about checking the jetting in your bike.
I noted you were using a 45 Pilot. Mine improved a lot from the 25 pilot in it to the 37.5 (which I had at home). Just about to order a bunch of extra pilots and a few mains from Hadrick now.
I also got hold of an original 1974 owners parts list from Adrian's dad. I have made a PDF copy and a paper copy. Let me know if you could use the PDF.
Kind regards
Pete
I noted you were using a 45 Pilot. Mine improved a lot from the 25 pilot in it to the 37.5 (which I had at home). Just about to order a bunch of extra pilots and a few mains from Hadrick now.
I also got hold of an original 1974 owners parts list from Adrian's dad. I have made a PDF copy and a paper copy. Let me know if you could use the PDF.
Kind regards
Pete
6
CZ / Re: 981 Clutch oil seals and tank colour
« on: December 13, 2023, 04:38:04 PM »
Hi ya Tony,
Now the clutch seems fixed I got it hot and found the jetting was a little lean.
Not sure if you have a favoured mix of jets - looks like a newish 36mm Mikuni
I just took it apart again so I'll document what is in it.
Main 280
Nozzle Jet 159 Q 5
Needle 6F5
Clip was in the middle - as of yesterday dropped the clip one down - richer and it went a lot better
Pilot - 25
Slide 2.5
Air Screw was at 1 and Half
Im going to do some searching now.
For future reference the Clutch Seals and Bearings are as follows
The 2 needle bearing inside the clutch are K 25 x 30 x 13 ( C3's )
Item 26 is an ORing 43 x 35 mm
Item 8 is an ORing 26mm ID and 2mm diameter/thick
The Kickstarter seal is an ORing 24 x 20mm
And the main seal that goes in the clutch cover is 50 x 65 x 8 double lip with a spring - I used the normal black one because the Viton was only single lip I could get and wouldn't have worked.
Cheers Pete
Now the clutch seems fixed I got it hot and found the jetting was a little lean.
Not sure if you have a favoured mix of jets - looks like a newish 36mm Mikuni
I just took it apart again so I'll document what is in it.
Main 280
Nozzle Jet 159 Q 5
Needle 6F5
Clip was in the middle - as of yesterday dropped the clip one down - richer and it went a lot better
Pilot - 25
Slide 2.5
Air Screw was at 1 and Half
Im going to do some searching now.
For future reference the Clutch Seals and Bearings are as follows
The 2 needle bearing inside the clutch are K 25 x 30 x 13 ( C3's )
Item 26 is an ORing 43 x 35 mm
Item 8 is an ORing 26mm ID and 2mm diameter/thick
The Kickstarter seal is an ORing 24 x 20mm
And the main seal that goes in the clutch cover is 50 x 65 x 8 double lip with a spring - I used the normal black one because the Viton was only single lip I could get and wouldn't have worked.
Cheers Pete
7
CZ / Re: 981 Clutch oil seals and tank colour
« on: December 07, 2023, 08:56:46 AM »
Thanks so much Tony. Got a couple of them yesterday and the rest on order.
Had another win yesterday. Got hold of an original 1974 parts book. Will do electronic copy soon for who ever needs it. Super helpfull book
Cheers
Pete
Had another win yesterday. Got hold of an original 1974 parts book. Will do electronic copy soon for who ever needs it. Super helpfull book
Cheers
Pete
8
CZ / Re: 981 Clutch oil seals and tank colour
« on: December 05, 2023, 07:35:57 AM »
Thanks Tony. You are a champion.
Much appreciated.
I am in touch with my local bearing supplier and will change it to Viton etc.
Might look at that mod as well.
Kind regards
Pete
Much appreciated.
I am in touch with my local bearing supplier and will change it to Viton etc.
Might look at that mod as well.
Kind regards
Pete
9
CZ / 981 Clutch oil seals and tank colour and JETS
« on: December 01, 2023, 10:39:58 AM »
Hi Gents,
Had the 1973 380 going with new Vape Ignition. Brilliant.
New issue is oil leak behind the dry clutch.
Question - what are the sizes and or id numbers for the seal (and type maybe) and oring/s
? Possible 50 x 65 x 8 mm but not sure if single or double lip, or spring etc if it matters.
Question - size of the Oring on the kick starter shaft ?
Question - I want to paint a steel tank in the original '73 Blue colour. Any idea what the colour code is or close to it?
Many thanks once again
Pete
Had the 1973 380 going with new Vape Ignition. Brilliant.
New issue is oil leak behind the dry clutch.
Question - what are the sizes and or id numbers for the seal (and type maybe) and oring/s
? Possible 50 x 65 x 8 mm but not sure if single or double lip, or spring etc if it matters.Question - size of the Oring on the kick starter shaft ?
Question - I want to paint a steel tank in the original '73 Blue colour. Any idea what the colour code is or close to it?
Many thanks once again
Pete
10
CZ / Re: 1973 PARTS BOOK
« on: November 03, 2023, 06:27:38 PM »
Tony 27,
The document you supplied has been the biggest help ever. Much appreciated. the 380 is moving along very nicely. Parts arrived from CZ Stuff in the UK very well. Looking forward to 2024 with Hunter Classic VMX. Pete
The document you supplied has been the biggest help ever. Much appreciated. the 380 is moving along very nicely. Parts arrived from CZ Stuff in the UK very well. Looking forward to 2024 with Hunter Classic VMX. Pete
11
CZ / Re: 1973 PARTS BOOK
« on: October 06, 2023, 09:08:24 AM »
Thanks for the help guys. I did print some stuff off years ago for the 250 from CZ madness but it went with the bike.
Looking for what the std front and rear sprockets were for the '73 380. Currently has 13/52. Running off the book you kindly put up Tony that looks like standard for the 380. Thanks so much.
Cheers
Pete
Looking for what the std front and rear sprockets were for the '73 380. Currently has 13/52. Running off the book you kindly put up Tony that looks like standard for the 380. Thanks so much.
Cheers
Pete
12
Maico / 1977 FORKS HOW TO GET DAMPER RODS APART
« on: September 07, 2023, 06:28:39 AM »
Hi Guys,
How do I get the damper rods apart on my AW? I want to add PD valves but need to reduce the preload. I'm told that we need to shorten the alloy spacer that sits within the damper rod. I take it I need to get the alloy screw/nut cap that screws up into the fork leg. But it is on hard.
If anyone has fitted PD valves be good to get their views on the how too and oil specs etc.
Many thanks
Pete
How do I get the damper rods apart on my AW? I want to add PD valves but need to reduce the preload. I'm told that we need to shorten the alloy spacer that sits within the damper rod. I take it I need to get the alloy screw/nut cap that screws up into the fork leg. But it is on hard.
If anyone has fitted PD valves be good to get their views on the how too and oil specs etc.
Many thanks
Pete
13
CZ / 1973 PARTS BOOK
« on: June 01, 2023, 10:56:17 AM »
Hi Guys,
Did a 73 250 a few years ago. Now doing a 73 380. The 250 has gone to a new owner.
I am looking for the parts book to check for missing or odd bits on the 380.
Is it possible to down load an electronic copy from somewhere?
Kind regards
Pete in Wollongong
Did a 73 250 a few years ago. Now doing a 73 380. The 250 has gone to a new owner.
I am looking for the parts book to check for missing or odd bits on the 380.
Is it possible to down load an electronic copy from somewhere?
Kind regards
Pete in Wollongong
14
Kawasaki / Re: Decals for the KLX tank and plates
« on: July 17, 2021, 11:01:39 AM »
Thank you very much Cyclegod. Appreciate the help.
Going to give it one more going over and put it up for sale.
Many thanks
Pete
Going to give it one more going over and put it up for sale.
Many thanks
Pete
15
Kawasaki / Decals for the KLX tank and plates
« on: July 13, 2021, 06:17:59 PM »
Hi Boys, Can someone point me in the right direction of good quality tank and 250 decals for the KLX 1980.
Kind regards
Pete in Wollongong
Kind regards
Pete in Wollongong