Martins Valve Clearances!

[Evilchicken0]

I did a restoration project with Phil and this was done.

It's not so much the petrol or the addative, it's got more to do with banging a valve against the head as many times as 14,500 per minute ... even 10,000 times in a 1 hour 40 min ride is MILLION times.
That's why the valves are dished !!!

[ARn13]

Mr Evil is quite right, these japanese engines even though old are made to take unleaded fuel.
check ur valve stem for wear.
grinding in ur new valves start wiith a coarse paste then finish off with a fine one, valves ur not changing just use fine paste.u`ll know its all good when u get the that nice perfect line finish around the valve seats and valves itselfs.
And make sure valve stems oil seals are off. dont fit new ones before u lap ur valves in.

[Marty_rillo]

I guys been busy as a bee but im back on the bike working hard!!
The inlets are all completely shafted the exhaust valves are also ruined!! So i have ordered all new ones and stem seals!! It cost so much!! The valve seats are a concern, im thinking to lap them in without cutting the seats, but a i know it would be a benefit to cut them!! But getting a valve seat cutter for a 400 up here in shetland is difficult!! so any advice?
Also here a list of parts that seem to be discontinued
Does anyone know where i can get them elsewhere?

For 1990 3tj
1:Damper chains front and rear
2:carb to engine rubber sleeves
3:Rubber swingarm protector from the chain

Cheers guys
Im hoping to get it all together and running for the next wkd so i shall keep yopu posted!

[cagiva996]

Try fowlers of bristol,i bought a chain guide rubber from them only about 6 weeks ago,and id bet theyd have the other stuff too,just make sure youve got your frame number handy to give to the parts guy over the phone.if i remember rightly the guide rubber was 14 quid-give em a try.

[Evilchicken0]

Why not get in touch with Mick C - http://www.400greybike.info/newforum/vi ... 17&t=14287" onclick="window.open(this.href);return false;

If his head is ok you could maybe just drop it straight on

[Marty_rillo]

Thanks guys! Just bought all the valves so would just be looking at the head if i need too, Going to wait and look at the wear with a new valve for comparison before i make my mind on a new or replacement head!
But im aiming for as good a job as possible for the bike so who knows!
Cheers martin