Replacing value guide seals
- freeridenick
- Posts: 1660
- Joined: Fri May 23, 2014 1:30 pm
- Location: Derbyshire
Replacing value guide seals
What are folks thoughts on replacement? I've got a set of heads for an engine rebuild and I'm not sure whether they need the seals replacing. The heads haven't been on an engine for a few years - they were the ones from my bust engine that I replaced with the stg1 ones.
I don't remember that engine using oil but the valves had a sticky film on the neck; shoulder; transition area, whatever it's called. I'm wondering whether that's from oil leaking when the engine was running or just oil that's leaked down the seal during storage. If it's the former then I'd replace but the latter should just be a case of cleaning and reassembly, right?
I don't remember that engine using oil but the valves had a sticky film on the neck; shoulder; transition area, whatever it's called. I'm wondering whether that's from oil leaking when the engine was running or just oil that's leaked down the seal during storage. If it's the former then I'd replace but the latter should just be a case of cleaning and reassembly, right?
Re: Replacing value guide seals
For the small cost, I'd do it. You can also refresh the valve seats.
It's not falling off, it's an upgrade opportunity.
- freeridenick
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- Location: Derbyshire
Re: Replacing value guide seals
Quite the mark up.....they go for $8 here

Loud pipes don't save lives, knowing how to ride your bike will save your life.
- freeridenick
- Posts: 1660
- Joined: Fri May 23, 2014 1:30 pm
- Location: Derbyshire
Re: Replacing value guide seals
Re: Replacing value guide seals
If you do try Ron Ayersfreeridenick wrote: ↑Tue Oct 27, 2020 7:46 pmI think I'll start hunting for the part numbers on some US sites.

Loud pipes don't save lives, knowing how to ride your bike will save your life.
Re: Replacing value guide seals


Wemoto are showing Genuine Honda Part for £7.31 each including vat. Although I thought exhaust and inlet would be the same seals, however according to Ron Ayres they show two different part numbers, so be aware and double check yourself if you decide to purchase some:-
https://www.wemoto.com/parts/picture/ho-12208-mbb-003
https://www.wemoto.com/parts/picture/ho-12209-mbb-003
Who wanted £22+ each

Chris.
- freeridenick
- Posts: 1660
- Joined: Fri May 23, 2014 1:30 pm
- Location: Derbyshire
Re: Replacing value guide seals
Cheers Chris. The part numbers I have a different and it was David Silver and Fowlers turned them up ar £22 eachsirch345 wrote: ↑Tue Oct 27, 2020 8:52 pm![]()
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Wemoto are showing Genuine Honda Part for £7.31 each including vat. Although I thought exhaust and inlet would be the same seals, however according to Ron Ayres they show two different part numbers, so be aware and double check yourself if you decide to purchase some:-
https://www.wemoto.com/parts/picture/ho-12208-mbb-003
https://www.wemoto.com/parts/picture/ho-12209-mbb-003
Who wanted £22+ eachAnother quick search, I see Fowler's are selling them for £9.17 each including vat,
Chris.
https://www.davidsilverspares.co.uk/par ... 204MBB305/
I got the part numbers from bike-parts-honda
https://www.bike-parts-honda.com/honda- ... 00/1/11510
- freeridenick
- Posts: 1660
- Joined: Fri May 23, 2014 1:30 pm
- Location: Derbyshire
Re: Replacing value guide seals
What an idiot!
I was looking at the valve guides not the seals.
I was looking at the valve guides not the seals.

Re: Replacing value guide seals
I have a couple of new ones I don't need you can have for a fiver posted.
Can't recall if they're inlet or exhaust.
Can't recall if they're inlet or exhaust.
It's not falling off, it's an upgrade opportunity.
Re: Replacing value guide seals
I'm pleased for you that was all it was Nickfreeridenick wrote: ↑Tue Oct 27, 2020 9:25 pm What an idiot!
I was looking at the valve guides not the seals.![]()

I know you can come across silly prices for Japanese spares, but that price (£22+ each) did seem like a pi$$ take.
I was trying to help, then it looked like I'd made matters worse for you

I'm glad that wasn't the case,
Chris.
Re: Replacing value guide seals
Turns out it was two inlet seals, 7347123.
Yours if you want them.
It's not falling off, it's an upgrade opportunity.