Yamaha FZ6 Fazer

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//j17

Original Poster:

4,487 posts

224 months

Thursday 26th July 2007
quotequote all
Does anyone know how the throttle bodies attach to the engine on a Yamaha FZ6 Fazer?

Picked a set up cheap on fleaBay and looking to use them to convert my car to fuel injection but not at all obvious how they are mounted on the bike to fabricate an inlet manifold.

Any takers?

Conian

8,030 posts

202 months

Thursday 26th July 2007
quotequote all
Don't know... but Fazers are cheap, so probly just bolted on.
What car is gonna work off a 600cc injetion system?

//j17

Original Poster:

4,487 posts

224 months

Thursday 26th July 2007
quotequote all
Conian said:
Don't know... but Fazers are cheap, so probly just bolted on.
That's my problem - no sign of bolt holes! Have what look like location points on the engine face of the bodies but no witness marks on the other face to suggest it's clamped.

Conian said:
Don't know... but Fazers are cheap, so probly just bolted on.
With a but of luck a 1300 Spitfire...

Conian

8,030 posts

202 months

Thursday 26th July 2007
quotequote all
Ambitious! Good luck with that! (I think you is gonna need it!!!)
Has anyone done it before or are you being a pioneer?

I cant help but think it's gonna be more trouble than it's worth.

That Daddy

18,969 posts

222 months

Thursday 26th July 2007
quotequote all
Bike throttle bodies are normally pushed into rubber sleeves and secured by clips(like jubilee clips but better)and those bodies will work, but they will need to be run off a Megasquirt or Emerald aftermarket ECU system,you have your work cut out with this one,that engine is hardly a deep breather so you will probably find your choice of bodies ok.

Silent1

19,761 posts

236 months

Friday 27th July 2007
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What is the benefit over a decent set of car throttle vodies? it's not like it's doing 14k rpm

chuntington101

5,733 posts

237 months

Friday 27th July 2007
quotequote all
Silent1 said:
What is the benefit over a decent set of car throttle vodies? it's not like it's doing 14k rpm
small, light, compact and as said before cheap smile

Chris.

That Daddy

18,969 posts

222 months

Friday 27th July 2007
quotequote all
chuntington101 said:
Silent1 said:
What is the benefit over a decent set of car throttle vodies? it's not like it's doing 14k rpm
small, light, compact and as said before cheap smile

Chris.
Nuff saidwink

//j17

Original Poster:

4,487 posts

224 months

Friday 27th July 2007
quotequote all
Silent1 said:
What is the benefit over a decent set of car throttle vodies? it's not like it's doing 14k rpm
1) Shits and giggles - have the time, money and inclination to do something a bit different.
2) More power - get the correct amount of fuel and the spark at the optimum advance for each 'bang'.
3) Better fuel economy - same reason as #2 really - not running slightly rich at the bottom as the SU needle goes a little lean in the middle.

A number of people have converted 6-cylinder Triumphs to EFi but they have the easy life - you just get a set of Lucas PI (mechanical petrol injection) throttle bodies and have the injector bosses re-machined to take EFi injectors. These bolt straight on to the 6-pot heads but not the 4-pot (found the hard way - anyone need a set of PI bodies? smile).

That Daddy said:
Bike throttle bodies are normally pushed into rubber sleeves and secured by clips(like jubilee clips but better)and those bodies will work, but they will need to be run off a Megasquirt or Emerald aftermarket ECU system,you have your work cut out with this one,that engine is hardly a deep breather so you will probably find your choice of bodies ok.
I'm guessing the whole throttle body assembly doesn't just 'hang' in space, suspended by the rubber tubes to the engine/air box though - and there isn't any sign of how they are supported. Also the engine face is clearly machined flat - which suggests as gasket mounting.

I've looked at the options and am probably going to go for an Emerald ECU - Dave Walker isn't exactly shy and anyone who has stood on their soap box as long as he has without leaving a trail of abuse on the Internet can't be telling too many lies!

The bodies should work OK, though the accelerator cams may need adjustment (bikes have nothing at the bottom so tend to open a little sharply for use on car engines). If they can fill a 150cc cylinder at 14,000 RPM they should be able to fill a 300cc cylinder at 7,000 RPM.

Edited by //j17 on Friday 27th July 09:43

Mr2Mike

20,143 posts

256 months

Friday 27th July 2007
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//j17 said:
I'm guessing the whole throttle body assembly doesn't just 'hang' in space, suspended by the rubber tubes to the engine/air box though
That exactly how they are supported on all bikes I have seen. The airbox is bolted to the frame, and the rubbers at either end are fairly stiff so the throttle bodies are well supported. It's not as though they weigh as much as a pair of DCOEs or anything.

That Daddy

18,969 posts

222 months

Friday 27th July 2007
quotequote all
Mr2Mike said:
//j17 said:
I'm guessing the whole throttle body assembly doesn't just 'hang' in space, suspended by the rubber tubes to the engine/air box though
That exactly how they are supported on all bikes I have seen. The airbox is bolted to the frame, and the rubbers at either end are fairly stiff so the throttle bodies are well supported. It's not as though they weigh as much as a pair of DCOEs or anything.
yes