Topic: Replacement Intake Valves

[kaysystems]

Hi folks

Can anyone tell me if these are any good?

http://cgi.ebay.com/ebaymotors/INTAKE-VALVES-FOR-HONDA-CB750_W0QQcmdZViewItemQQcategoryZ35595QQitemZ4591730993QQrdZ1QQsspagenameZWDVW

Thanks

David

[MRieck]

I can't tell you if they are any good but I'll say OEM or Kibblewhite are excellent replacements. To much cost involved (engine removal, valve job etc) to guess on quality.

[maksuttt]

I know, this topik is too old
I bought on Ebay really cheap Kibblewhite black diamond valve set (in-ex) for my 1975 750F - just $155+shipping. The question is, which guides to choose: OEM or Kibblewhite? Kibblewhite seems to be cheaper...
Thank you.

[Pinhead]

I'd say since you've got Kibblewhite valves, go with Kibblewhite guides. I've never personally used them, but I like the idea of valves matching the guides.

Have you ever heard of "surface turbulence" valves?

[maksuttt]

I'd say since you've got Kibblewhite valves, go with Kibblewhite guides. I've never personally used them, but I like the idea of valves matching the guides.

Have you ever ?

Probably you are right about matching Maybe someone had experience with both types: which does last longer? I wont do any performance modification, except (maybe) hemiing head and ports cleaning. I just want to get bulletproof engine:)

I have never heard about "surface turbulence" valves... Tried to find something with Goggle minute ago... OK, maybe i need to try one more time Any benefits of using them?

[bwaller]

A few years ago I had the valve seats changed in a otherwise excellent condition head. I installed the Kibblewhite stainless valves and their guides, really nice parts. I talked to the shop manager then and he claimed the guides should wear at least as well as original. That was in 97 and haven't had it apart since so can't tell you how things look, but the bike is as quick and responsive as it ever has been.

[MRieck]

I've installed many sets of Kibblewhite and APE guides......no problems with either. They have both shown good wear characteristics. The Kibblewhite and APE also sit lower in the head.

[Pinhead]

I have never heard about "surface turbulence" valves... Tried to find something with Goggle minute ago... OK, maybe i need to try one more time Any benefits of using them?

http://www.metricmechanic.com/pdfs/M3_Engine.pdf#search=%22%22surface%20turbulence%22%20combustion%20chamber%20bmw%22

It's a PDF document, you need to scroll down a bit to find the "ST Valves & Guidelines" section. It's under M3 Engine Anatomy. They're not on a motorcycle, but the benefits are universal.

[maksuttt]

OK, now i am sure Will go with Kibblewhite guides. Thank you guys!
2Pinhead: Also, checked the link. Name sounds cool, in life - pretty easy

[maksuttt]

Hey!
One more question in this thread...
I contacted APE - they have guides in stock, and guides don't require reaming after installation. What about Kibblewhite guides? Do I need to ream them (it seems to me more traditional ?
Thank you!

[MRieck]

While the ID of APE guides are close the very often  still need honing. Kibblewhite always need honing. I prefer honing as you can achieve the exact clearance. As a side bar....I just installed some APE guides in a GSXR Slingshot head and they need honing

[maksuttt]

While the ID of APE guides are close the very often  still need honing. Kibblewhite always need honing. I prefer honing as you can achieve the exact clearance. As a side bar....I just installed some APE guides in a GSXR Slingshot head and they need honing

Thank you, MRieck!
Which kind of hone is better for use? Selfadjustable (adjustable) with stones&springs or one piece machined in size (maybe with cones to adjust OD?) + fine abrasive compound?
Thanks again.