Z1OwnersClub GB

hi guys, not sure if i've asked this before cos I've put put this project on the back burner for so long now. Anyway my question is, will my engine seize with stoved barrels and heads ? The actual bike is an RD 400 which I bought with this already done and I'm scared that it will. Has anyone had experience with this situation before ? some folk are saying it'll be fine, others saying no way. The engine is like new on it's standard bore and tight as a drum so I don't want to wreck it. Also if it has to come off, what can I use to remove it ? thanks to all replies. I know it's not a Zed but surely same thing applies for all aircooled, $

It's not ideal and won't have the same heat dissipation of other applications but if you don't intend to thrash it and treat it like a dog it should be O.K.

Really ? If that's the case that'll be brilliant. No I don't intend to thrash it. The RD400 was the second bike I ever owned (legally on the road that is) But older (much) and wiser (not much) now so I'm just harking back to my youth as many of us do. That's the news I wanted to hear, It'll save me so much hassle and let me finish this build. Thank you so much mate, cheers $

Stove enamelling won't effect it.
Just thrash as normal.
And if the paint is black the barrels will actually run up to 50 degs cooler than bare alloy anyway.

Wow, I'm amazed cos the way some folk I've talked to were saying it would seize immediately. If it'll run even cooler that's a bigger bonus. Cheers guys. $ PS. love you Zeph, I got 3, one 750, 1100 and an 1100 i'm fighting.

Rob,
what temperature should engine paint be cured to?
Local powder coater says 200 degrees? How long for?

~Jay.

ADMIN COME ON!!!!

This thread is implying that RD400 owners thrash their bikes everywhere.

I will be making the RD400 Owners Club aware of this derogative thread.

Yea Kin right an all.

zed1015 wrote:Stove enamelling won't effect it.
Just thrash as normal.
And if the paint is black the barrels will actually run up to 50 degs cooler than bare alloy anyway.

Not wanting to cause a bun fight but I'm happy to accept certain coating can give better heat dissipation but as stove enameling is mainly for protection how does dissipate the heat better than bare alloy.

Serious question as I'm happy to learn new things.

garyd wrote:

zed1015 wrote:Stove enamelling won't effect it.
Just thrash as normal.
And if the paint is black the barrels will actually run up to 50 degs cooler than bare alloy anyway.

Not wanting to cause a bun fight but I'm happy to accept certain coating can give better heat dissipation but as stove enameling is mainly for protection how does dissipate the heat better than bare alloy.

Serious question as I'm happy to learn new things.

It's not the coating, it's the colour that dissipates heat faster and black dissipates heat more than any other colour which is the main reason why the majority of engines (especially air cooled) and vehicle radiators etc are that colour.
However stove enamelling in the vehicle world is just baked on paint ( NOT vitreous enamel as used on cast iron baths etc which contains powdered glass ) and has been used motorcycle engines for years with no problem.
It is mainly used for its high heat resistant properties on engine barrels etc and for its smooth gloss appearance on frames and resistance to solvents .
It can be applied in many different colours and although it won't burn off easily it isn't that mechanically tough and actually chips fairly easily (which is why powder coating has become more popular for chassis parts) .

If stoving caused any overheating problems i'm sure Stan Stephens wouldn't use it on his engine rebuilds.

http://www.stanstephens.com/2stroke.htm

Jay1969 wrote:Rob,
what temperature should engine paint be cured to?
Local powder coater says 200 degrees? How long for?

~Jay.

When doing my own engines with simoniz tough black or similar the temp is around 200 deg but the length of time varies with the size of the component as larger items take longer to get up to temperature.
I use the visual appearance to gauge when they are cooked enough.
With the satin black I wait until it takes on a wet appearance before shutting off the heat and letting it cool slowly.
Prior to baking, the parts are blasted / pre-heated / painted and then left overnight for all the solvent to have evaporated.
If this is not done there is a good risk that the paint will blister as the solvent can react to the heat..

It's not the coating, it's the colour that dissipates heat faster and black dissipates heat more than any other colour which is the main reason why the majority of engines (especially air cooled) and vehicle radiators etc are that colour.
However stove enamelling in the vehicle world is just baked on paint ( NOT vitreous enamel as used on cast iron baths etc which contains powdered glass )

Ah...I think that may be where my head was at

All those old kitchen appliances were stoved

It's all Black so i should be OK. $