Differences between 1000G and 1100G head?

[Nessism]

Anyone know how the 1100G head compares to the '80-'81 GS1000 head? Combustion chamber size the same or larger? Is the exhaust port height the same? I know the late model 1100G head has those nifty D shaped exhaust ports but is it the same otherwise? The part numbers are different so that's not a good sign for interchange.

[hampshirehog]

For what it's worth. I've never compared the 2 side by side and only ever worked on one 1100G (it is / was very unusual over here) but from what I can remember, from back in the day, they look the same (other than the D ports).

[TheCafeKid]

Crank/clutch basket lower bits are different but according to the cycle mags of the day the 1000E and G are exchangable. Supposedly the racers went after the G heads because of said D shaped exaust ports. But again the cycle mags aren't always accurate.

[Nessism]

Combustion chamber size and exhaust port location are the two main thing I’m trying to understand. There is a 1100G head on ebay I want to purchase, but I want to have the stock compression ratio and use a regular 1000 exhaust system (if I can find a good one that is).

[TheCafeKid]

Combustion chamber size and exhaust port location are the two main thing I’m trying to understand. There is a 1100G head on ebay I want to purchase, but I want to have the stock compression ratio and use a regular 1000 exhaust system (if I can find a good one that is).

Well the exhaust ports are the same spacing. As a matter of fact I've said before that any 750 and larger (minus the second gen 16v 700/750 and even they are the same spacing but different depth diameter) pipe will swap AT THE HEAD. I've examined it with multiple pipes from different GS models. The problem is USUALLY the rear brackets. The G pips were longer than the E by a touch. But that's easy enough to overcome. I do believe that Kurt (Dardoonk) used a 1100GK head on his 1000E motor build.

[Nessism]

Well, I bought that 1100G head off ebay tonight. Less than 10k miles so couldnt' pass it up. Hopefully the combustion chamber is not much larger than the 1000 head. Concern with the exhaust ports is the height, not concern with the spacing. I plan to use an OE exhaust and want to fit like stock under the bottom of the engine.

[chef1366]

It's a plug and play Ed.
It won't be stock though

[Nessism]

Head I bought off ebay was a POS: several stripped exhaust bolt holes, gouges on some cam bearing, and three valve spring buckets jammed in crooked due to poor packaging.

Sent the head back at my cost after the seller somewhat indigently agreed to take it back saying he would refund my money "if" the head could be verified as being the same one that he shipped.

So now the guy has had the head back for three days and I still don't have a refund. Sent him a note though ebay asking when he's going to process the return and he hasn't answered the message.

How long should I wait before giving this guy negative feedback and fill out a paypal dispute? I'm pretty impatient about stuff like this some times.

[oldgrumpy]

damaged hesd ..... waiting for refund...

hi guys i know its a touchy subject ..but i,d send him a couple of emails being polite ..but reminding him that your not in the market for alloy scrap metal.. you did want a good to very good working head... wait a week for him to send refund .......then post neg.. slaming feedback that will wake him up ...also let everybody know what trading name he goes under on ebay... so that we all don,t end up helping to clean his shed of the scrap metal he doesn,t want ... a while ago i purchased 3 watches off ebay .com .au in aust.. from sydney... her feedback was around 90 or lower ..all i ended getting was 3 smashed watches in a paper envelope which taught me a lesson regards david

[tkent02]

I wouldn't be polite at all, he's a crook.
I hope you didn't pay much, ebay and paypal are pretty worthless at this.

Sometimes if I question the seller I take a little longer and use a postal money order, that way if he scams me it is Postal Fraud, serious stuff.

[chef1366]

Keep all communication within Ebay.
File a case if unsatisfied with his responses. Ebay can see all communicatioin.
They refunded me my money on a pipe dream head that I never got.

[Octain]

Ed, did you ask about any imperfections before the purchase? If so and the seller verified it as being good in writing then you can dispute the issue with ebay/paypal. If not, and its stated in the auction as being "no refunds, as is" then you may be out the purchase money.
If you've emailed the seller with unsatisfactory results then deal with ebay/paypal only. Let them know what's going on and they will deal with the seller.

Leaving the seller feedback pretty much closes the deal, good or bad. I'd hold off on that till the deal is resolved.

[Nessism]

Got my refund. Guy came though...sort of.

[rapidray]

What do you mean "sort of"? How much did it cost you?!! Ray.

[Octain]

Got my refund. Guy came though...sort of.

Sort of?
Whats that mean?