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Stock 650 style shim under bucket & retainers 23 Dec 2021 02:27 #859530

  • z1kzonly
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I’ve seen these factory parts used on the bigger KZ / Z1’s. Are they strong enough for high horsepower / RPM  abuse?
and are the spring retainers aluminum alloy or steel? Have a guy wants to cut cost’s on a top end rebuild on a dragbike engine. He says he has a stock set. Wants to use on high lift cams. Asked me to set them up. I’d hate to see it fail and ruin the engine?
Livin in "CheektaVegas, NY
Still have a Kaw! 76 KZ900 Pro-Street.
Went thru 25 of these in 40 yrs.

And The Old Girl, Harley 75 FLH Electra Glide,
Old faithful! Points ign. Bendix Orig. carb.
Starts everytime!

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Stock 650 style shim under bucket & retainers 23 Dec 2021 05:31 #859531

  • Nessism
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I don't know how robust the 650 parts are, but I do know the retainers are steel.  I've never seen any stock engine, motorcycle or car, that used aluminum valve spring retainers.  But then again, I'm far from all knowing regarding such matters.

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Stock 650 style shim under bucket & retainers 23 Dec 2021 06:20 #859532

  • zed1015
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As the previous reply.
Stock retainers are steel.
No problem using them.
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Stock 650 style shim under bucket & retainers 23 Dec 2021 10:10 #859537

  • Scirocco
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APE sells titanium valve spring retrainers.

 
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Stock 650 style shim under bucket & retainers 23 Dec 2021 10:45 #859539

  • SWest
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Very common HP mod. 
Steve

Z1b1000 1975 Z1b
Opinions expressed by me do not reflect those of the the staff or members
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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Stock 650 style shim under bucket & retainers 23 Dec 2021 10:54 #859540

  • Dr. Gamma
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Yoshimura Japan offers H/D spring kits with some fancy steel spring retainers for the Z1, Kz900, and Kz1000's motors. They still offer both styles of valve keepers too!!

 

 
1972 H2 750 Cafe Racer built in 1974.
1976 KH400 Production Road Racer.
1979 Kz1000 MK. II Old AMA/WERA Superbike.
1986 RG500G 2 stroke terror.
1986 GSXR750RG The one with the clutch that rattles!

Up in the hills near Prescott, Az.
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Stock 650 style shim under bucket & retainers 23 Dec 2021 18:40 #859545

  • z1kzonly
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Yes, of course I know they are used for ever, I was just checking on alloy / material? Hoping these are Titanium. Just for eBay sale. I’m done. I don’t need them. But 1/2 are worn with a grove depression from cam lobe?
Livin in "CheektaVegas, NY
Still have a Kaw! 76 KZ900 Pro-Street.
Went thru 25 of these in 40 yrs.

And The Old Girl, Harley 75 FLH Electra Glide,
Old faithful! Points ign. Bendix Orig. carb.
Starts everytime!

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Stock 650 style shim under bucket & retainers 23 Dec 2021 18:44 #859546

  • z1kzonly
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Yes, of course I know they are used for ever, I was just checking on alloy / material? Hoping these are Titanium. Just for eBay sale. I’m done. I don’t need them. But 1/2 are worn with a grove depression from cam lobe?
Livin in "CheektaVegas, NY
Still have a Kaw! 76 KZ900 Pro-Street.
Went thru 25 of these in 40 yrs.

And The Old Girl, Harley 75 FLH Electra Glide,
Old faithful! Points ign. Bendix Orig. carb.
Starts everytime!

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Stock 650 style shim under bucket & retainers 23 Dec 2021 18:50 #859547

  • z1kzonly
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I bought a pile of stuff other day. This stuff was in a box with it all. Picked up KZ  z nice set of Wisecos, 72mm, with broke fin block.
and a 76mm block big liner set. eBay items after I clean and glass bead everything
Livin in "CheektaVegas, NY
Still have a Kaw! 76 KZ900 Pro-Street.
Went thru 25 of these in 40 yrs.

And The Old Girl, Harley 75 FLH Electra Glide,
Old faithful! Points ign. Bendix Orig. carb.
Starts everytime!

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Stock 650 style shim under bucket & retainers 23 Dec 2021 19:00 #859548

  • z1kzonly
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Z1B # 080,285 case with 81mm bored spigots for the 1200 sleeves. Was a nice job! 76 Frame sitting, waiting on a New York State title! 12 weeks time frame!
trying to use new smart phone app? WTF?
Livin in "CheektaVegas, NY
Still have a Kaw! 76 KZ900 Pro-Street.
Went thru 25 of these in 40 yrs.

And The Old Girl, Harley 75 FLH Electra Glide,
Old faithful! Points ign. Bendix Orig. carb.
Starts everytime!

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