Best option for replacement engine

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AussieRob2001
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Location: Sydney, Australia

Best option for replacement engine

Postby AussieRob2001 » Tue Sep 13, 2016 10:35 am

Hiya everyone...
Can anyone advise what would be the easiest replacement engine for the GTS?
I may have access to a rolling frame but missing the engine.
Any advice would be greatly appreciated.
Cheers
Aussie Rob :cheers:

Searcher
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Location: Devon UK

Re: Best option for replacement engine

Postby Searcher » Thu Sep 15, 2016 9:22 pm

Well of course the GTS engine is basically a detuned version of the FZR1000 EXUP, which became the Thunderace.
Any of those engines would drop into the frame easily, but that's would be just the start of a major headache.
Remember the aforementioned engines were designed to be carb fed.
The GTS is injected.
I think it would be doable, but the amount of work involved and parts to source would be mind boggling.
I'd go for a GTS engine, and there are two available on ebay at the moment.
Are they in good running order though ?
This one looks to be good on the outside
http://www.ebay.co.uk/itm/Yamaha-GTS100 ... SwR0JUNXDW
Rather you than me
Best of luck.

AussieRob2001
Posts: 6
Joined: Sun Sep 11, 2016 4:18 pm
Location: Sydney, Australia

Re: Best option for replacement engine

Postby AussieRob2001 » Tue Sep 27, 2016 5:12 pm

Hi
Thank you for your reply.
My preference would be a replacement GTS engine however only 10 bikes were ever imported in
Australia.
Dont like my chances of finding one her...
So, either I import one or use the fzr.
Any mechanical minded people who might know if I can simply attach the
Injection throttle body off the GTS onto the fzr engine?
Cheers
Rob

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Re: Best option for replacement engine

Postby Searcher » Thu Sep 29, 2016 12:01 am


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Posts: 34
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Re: Best option for replacement engine

Postby Searcher » Thu Sep 29, 2016 12:01 am

Check this out.
Plenty of talk, but as far as I know, no one has actually succeeded

Searcher wrote:http://www.gtsclub.org/phpBB3/viewtopic.php?f=26&t=773

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Devonian
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Re: Best option for replacement engine

Postby Devonian » Thu Sep 29, 2016 6:11 am

So I read the linked thread and 24c infuriatingly never finished his report. It's like someone tore the last few pages out of a mystery novel.
MSF Ridercoach -- IBA: 35353 -- 95 R1100GS, 85 R80RT, 96 DR350, 85 TW200, 99 DX125

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Re: Best option for replacement engine

Postby Searcher » Mon Oct 03, 2016 7:24 pm

Devonian wrote:So I read the linked thread and 24c infuriatingly never finished his report. It's like someone tore the last few pages out of a mystery novel.


Which kind of illustrates my point.
It sounds fine in theory, but in reality it's just too complex to undertake.
I reckon 24c gave up.
I hope someone proves me wrong, but somehow, I think not.

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Devonian
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Re: Best option for replacement engine

Postby Devonian » Mon Oct 03, 2016 8:29 pm

...actually I figured out the one thread morphed into another, then another - in which 24c tried to make the whole thing work with an aftermarket programmable ECU (microsquirt.) He ultimately seemed to be successful but I'm not sure he ever got it running 100% right as the thread petered out. At one point the "easy" solution seemed to be using the GTS ECU to run the injection and the Thunderace ECU to run the ignition. Switching to carbs would not be the end of the world, presuming there is room to install them. Depending what's wrong with your engine, a rebuild (possibly using donor parts from an FZ/Thunderace) might be a good option. I presume shipping to Oz is outrageously expensive but not entirely out of the question either - It would certainly save a LOT of hassle.
MSF Ridercoach -- IBA: 35353 -- 95 R1100GS, 85 R80RT, 96 DR350, 85 TW200, 99 DX125

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Re: Best option for replacement engine

Postby Searcher » Tue Oct 04, 2016 12:55 am

Devonian wrote:Depending what's wrong with your engine, a rebuild (possibly using donor parts from an FZ/Thunderace) might be a good option.


Except that he said the engine is missing
:roll:

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Devonian
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Re: Best option for replacement engine

Postby Devonian » Thu Oct 06, 2016 2:11 am

Ahah - so he did! Should have gone back and read the first post again.

In that case, based on my read of 24c's threads, AussieRob would need to flex his credit card, cross his fingers and get a GTS engine shipped from elsewhere. 24c had to swap a lot of external GTS engine bits onto the Thunderace engine to get it to work in the GTS chassis and with no donor to take those parts from the task would be much more challenging.
MSF Ridercoach -- IBA: 35353 -- 95 R1100GS, 85 R80RT, 96 DR350, 85 TW200, 99 DX125

devonrider
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Re: Best option for replacement engine

Postby devonrider » Thu Oct 06, 2016 9:52 am

Devonian wrote:In that case, based on my read of 24c's threads, AussieRob would need to flex his credit card, cross his fingers and get a GTS engine shipped from elsewhere. 24c had to swap a lot of external GTS engine bits onto the Thunderace engine to get it to work in the GTS chassis and with no donor to take those parts from the task would be much more challenging.


Agreed.
The time, effort and money involved in such a project would be far more than the outcome (if any), would be worth.
Personally, I'd just wait for one of those 10 GTS's that were sold in Australia to come up on the market.
Sorry to be the bearer of bad tidings.
Having said that, I hope you prove us all wrong, and if you do undertake this massive project, make sure you document it and post the results here, so that others may learn from your experiences.


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