Valves

Bond007

Registered User
#1
Hi I’m new to this room I’ve just bought a vfr 800 53 plate, the valves where done at 20.000 it’s now on 50.000 miles

Do I need to replace them ?
How and where to buy them?
Any particular valves better ?

Any help would be great thanks
 

Bumpkin

Formerly VFRChas
Site Sponsor
#2
Hi, firstly welcome.

From your description I strongly suggest that you need the services of a dealer or, preferably, a decent independent mechanic. As a VTEC your bike will require a complex procedure to check the valve clearances every 16,000 miles. Possible by the home mechanic but only with suffient knowledge, confidence and tools, no disrespect but this doesn't sound like you... First time I did mine it took about 20 hours (though I did a few other things whilst in there), last time (3rd) it took about 12.

The cost will be high and highly dependant on the hourly rate of the workshop.

There is the alternative of not bothering, many have used this approach and few have suffered any consequences. Not saying that I recommend this but the argument of a replacement engine being cheaper than the service is close to the mark, especially if you get away with high mileage without the work being done, is valid.
 

PAD

Registered User
Site Sponsor
#3
Replacing the engine in the event of a disaster would make it easier to check the valves and do the shims with the replacement on a bench, too!:eyepop::)

Bond007, You aren't looking at replacing the valves, just checking the clearances necessary in the valve train. As Bumpkin says, it's a complex task on the VTEC. Cams out just to be able to check those clearances. Not a job to tackle without plenty of confidence, a decent bit of knowledge and experience and plenty of time.
 

saintrommel

saintrommel
Site Sponsor
#4
Given that the v-tech valves only open about say 20% or less of the time in normal riding so presumably seats would wear a fifth of the amount of the always opening valves I might be tempted to measure the always used valve clearances and if they were ok leave the rest alone. I have been known to be wrong accourse:)
 
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Bond007

Registered User
#5
Brilliant I think I m going to leave it for now, thanks for the welcome, but if an open question really. Anything I need to be aware of in these bikes ? Things to check and do ect ?
 

joemcd

Registered User
Site Sponsor
#6
Brilliant I think I m going to leave it for now, thanks for the welcome, but if an open question really. Anything I need to be aware of in these bikes ? Things to check and do ect ?
Things to check and do would be the valve clearances

Do you have photographic proof that the valves were checked and adjusted at 20k?
I would tend to take any claim to them being done without proof as dubious.
Disregarding service schedules is not advisable.
 

Bumpkin

Formerly VFRChas
Site Sponsor
#7
Given that the v-tech valves only open about say 20% or less of the time in normal riding so presumably seats would wear a fifth of the amount of the always opening valves I might be tempted to measure the always used valve clearances and if they were ok leave the rest alone. I have been known to be wrong accourse:)
Of the two bikes that I've done this service on both had a significant number of VTEC valves outside of tolerance at 16k. IIRC the one that made it to 32k in my ownership didn't need any doing at that mileage. So either they weren't done accurately at the factory or there's break-in wear.
 
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