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What do you recommend I do with my Inlet Valves?

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I have an 08 450x, done over 100 hours, 50 hours since Ive owned it.

I'm having trouble with an inlet valve. Couple months ago I checked the shim tappets & found one of the inlets was completely closed up. I was having allot of trouble with starting it. So I got them set spot on.

Now only about 10hrs of riding later its very hard to start again. I tried just now to go for one last spin but the bastard wont start at all.

I know the cause of this, the titanium inlet valves pulling & closing up the valve stem clearance. Ive also heard the go is to replace them with Stainless valves. So I went to the local Honda dealer yesterday & talked to the guy there & he said that rite now my only problem is pulled inlet valves but if I replace with stainless I might it cause damage/pounded valve seats. I should really get new valve seats to suit the SS valves too.

What are your thoughts on that? Those of you who have simply replaced your OEM inlet valves with SS valves, have you had any more future trouble?

Should I just order a pair of SS inlets & a head gasket & do it myself? Or should I send it to a specialist in Australia & get it ported & polished & get them to replace the valves with what ever they recommend?

Havnt found anyone yet, gona a look in a bike magazine for cylinder head work adverts.

Anyone in Australia recommend where I should get the head work done?

My experience: Dad's a mechanic & I'm a Machinist/fitter of 7 years & ex-cylinder head re-conditioner, have a workshop manual, fully capable of doing my myself. But may be worth getting the Pro's to do it?

Thought? :thumbsup:

Cheers,

Paul.

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I have an 08 450x, done over 100 hours, 50 hours since Ive owned it.

I'm having trouble with an inlet valve. Couple months ago I checked the shim tappets & found one of the inlets was completely closed up. I was having allot of trouble with starting it. So I got them set spot on.

Now only about 10hrs of riding later its very hard to start again. I tried just now to go for one last spin but the bastard wont start at all.

I know the cause of this, the titanium inlet valves pulling & closing up the valve stem clearance. Ive also heard the go is to replace them with Stainless valves. So I went to the local Honda dealer yesterday & talked to the guy there & he said that rite now my only problem is pulled inlet valves but if I replace with stainless I might it cause damage/pounded valve seats. I should really get new valve seats to suit the SS valves too.

What are your thoughts on that? Those of you who have simply replaced your OEM inlet valves with SS valves, have you had any more future trouble?

Should I just order a pair of SS inlets & a head gasket & do it myself? Or should I send it to a specialist in Australia & get it ported & polished & get them to replace the valves with what ever they recommend?

Havnt found anyone yet, gona a look in a bike magazine for cylinder head work adverts.

Anyone in Australia recommend where I should get the head work done?

My experience: Dad's a mechanic & I'm a Machinist/fitter of 7 years & ex-cylinder head re-conditioner, have a workshop manual, fully capable of doing my myself. But may be worth getting the Pro's to do it?

Thought? :thumbsup:

Cheers,

Paul.

Replace all the intake parts, including the seats. Use SS valves.

Unless you are an expert at 5-angle seat grinding, don't bother doing it your self. This is not a lap-and-go type motor.

Dozens of head re-builder in OZ that will rebuild the head a a couple of weeks, like new.

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Ok I know who Im sending the head to now. I spoke to me mate Izzy from Suspensions R Us & he highly recommended I send the head to Wideline Motorcycle Engineering (Harry bell) on 03 5975 9522 - http://www.widelinemce.com.au/index.htm

I havnt got a price yet. But that doesn't matter, It'll be done properly.

I'll rip the head off today & send it to him this week.

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Harry sold his business... it's part of mornington honda or sometihng now.

Just get the faction intake kit from rocky for $161 and get C&C engineering to cut your seats for $70.

Edited by andrew_driscoll

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Harry sold his business... it's part of mornington honda or sometihng now. I wouldnt have recommended him anyway.

Just get the faction intake kit from rocky for $161 and get C&C engineering to cut your seats for $70.

Oh, ok? Bugger.

But what is this faction intake kit from rocky you speak of?

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well said... includes springs and retainers...

http://www.rockymountainatvmc.com/productDetail.do?navType=type&webTypeId=50&navTitle=Engine&webCatId=17&prodFamilyId=19690

get yourself some cheap 404's with the order as well... can't go wrong with the price.. $65 each if you stock up.

If it's done over 100 hours it might just about pay to put a piston in too.

Head gaskets are about $25 locally. You can get really cheap honda parts from mrcycles.com, but they are a little slow shipping.

JE pistons from albion cycles in qld are a good aftermarket piston, or perhaps a woosner from scotties in ringwood. Both very well priced unlike most aussie shops.

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