This topic contains 27 replies, has 0 voices, and was last updated by 
-
Gibbit wrote:64 days to go!!
Training is going Ok but I could be doing more.
The suspension is down at Mildura with Warren Smart getting serviced and tweaked. I will be pulling the engine out after easter and doing a compleate rebuild.
Not long now.
Keep us updated Gibbit , I’d love to have the talent and balls to enter this race but your account will keep the dream alive
Any pics of your bike would be great
Good luck with the preparation
Nick
Go hard Gibbit.But stay safe also.
Hope it all goes well mate.
Fly the flag for the OBT…..
hopefully one day i mite get out there and watch you bring it home.
Good luck mate..
…Spud…white rocket wrote:so no one going with you gibbit ? are they all sooks like melooks that way Mate.
I will get some pics up of the bike rebuild in the next few days.
Time to make the bike a bit more bullet proof.
The suspension is currently in Mildura getting tweaked by Warren Smart.
Can see I had a leaking Exhaust valve. I fixed that with a bit of a rub with grinding paste.
The piston and rings are being replaced.
Motors Out.
The bore is all good.
New fiction and pressure plates for the clutch.
Replacing the crank assembly, main bearings and all the bearings in the gearbox.
Organised Chaos!!
Hi Gibbit,
Just a word of caution. I noticed that you said one of the exhaust valves was leaking and you sealed it by using a bit of grinding paste. As I am a race engine builder with many years of experience with late model Yamaha cylinder heads using titanium valves. Assuming you are using the standard titanium valves they should never be lapped in using grinding paste as this wears through the hardened coating on the valve sealing face and causes premature inevitable loss of valve clearance. The best solution is to replace the valves with brand new ones and check for no valve seat wear.
Just some advice for you, however the choice is yours. Good luck with the rebuild.Cheers,
LeftyWow. I tip my fox hat to you Gibbit for doing the rebuild yourself. Good Luck in the Finke.
Lefty wrote:Hi Gibbit,
Just a word of caution. I noticed that you said one of the exhaust valves was leaking and you sealed it by using a bit of grinding paste. As I am a race engine builder with many years of experience with late model Yamaha cylinder heads using titanium valves. Assuming you are using the standard titanium valves they should never be lapped in using grinding paste as this wears through the hardened coating on the valve sealing face and causes premature inevitable loss of valve clearance. The best solution is to replace the valves with brand new ones and check for no valve seat wear.
Just some advice for you, however the choice is yours. Good luck with the rebuild.Cheers,
LeftyThanks for the advice mate. I have heard that before. I checked the valve was leaking by pouring a bit of petrol in there to confirm the leak. The valves where only about 15 hours old so I pulled that valve out and just gave it a bit of a 15 second rub with some paste by hand. That is all. I put it back in and checked it with petrol again and it sealed.
Do you think I may have done damage to the valves doing such a small amount of grinding?
I guess I wil find out next time I check my valve clearances.
Gibbit wrote:Lefty wrote:Hi Gibbit,
Just a word of caution. I noticed that you said one of the exhaust valves was leaking and you sealed it by using a bit of grinding paste. As I am a race engine builder with many years of experience with late model Yamaha cylinder heads using titanium valves. Assuming you are using the standard titanium valves they should never be lapped in using grinding paste as this wears through the hardened coating on the valve sealing face and causes premature inevitable loss of valve clearance. The best solution is to replace the valves with brand new ones and check for no valve seat wear.
Just some advice for you, however the choice is yours. Good luck with the rebuild.Cheers,
LeftyThanks for the advice mate. I have heard that before. I checked the valve was leaking by pouring a bit of petrol in there to confirm the leak. The valves where only about 15 hours old so I pulled that valve out and just gave it a bit of a 15 second rub with some paste by hand. That is all. I put it back in and checked it with petrol again and it sealed.
Do you think I may have done damage to the valves doing such a small amount of grinding?
I guess I wil find out next time I check my valve clearances.
Hey Gibbit,
Hard to tell mate to be honest as the coating is half a micron thick but it is a good chance of damage.
Put it this way if it were me and I was going to the trouble of a full rebuild before the Finke I would be putting a full set of valves in it. I would be pretty pissed off with myself if I rode the first leg to Finke and then the f#$*er won’t start for the return leg! Or worse drop a valve! :ohmy: It looks like you are going the whole hog on the rebuild……
Just putting it out there for consideration, but it’s up to you.
I hopre this advice helps and good luck with it all mate.Cheers,
Lefty
You must be logged in to reply to this topic.