Air supply :: Tank spacers :: Other methods - Page 3 - SV650.org

03-01-05, 10:50 AM

Quote:

Originally Posted by andrewcharnley

The difference between using tank spacers on a correctly setup airfilter and jets is significant. I took my make shift ones out today and went from 130mph to 90mph! Mid-range is bad too.

Could this not be carb-icing caused by the extra cold airflow coming in the newly made gap directly under the tank? When I get carb-icing bad, it reduces the top speed to around 90mph too.

.

03-01-05, 12:24 PM

Quote:

Originally Posted by jonboy

Quote:

Originally Posted by andrewcharnley

The difference between using tank spacers on a correctly setup airfilter and jets is significant. I took my make shift ones out today and went from 130mph to 90mph! Mid-range is bad too.

Could this not be carb-icing caused by the extra cold airflow coming in the newly made gap directly under the tank? When I get carb-icing bad, it reduces the top speed to around 90mph too.

.

It was pretty nice the day I rode it and I've had carb icing before so I know what effect it has. This was richness.

I'm going to stick with spacers for now. Anyone who's after something to do the job, two door stops in black fit perfectly and look great.

03-01-05, 01:06 PM

Quote:

Originally Posted by andrewcharnley

Quote:

Originally Posted by jonboy

Quote:

Originally Posted by andrewcharnley

The difference between using tank spacers on a correctly setup airfilter and jets is significant. I took my make shift ones out today and went from 130mph to 90mph! Mid-range is bad too.

Could this not be carb-icing caused by the extra cold airflow coming in the newly made gap directly under the tank? When I get carb-icing bad, it reduces the top speed to around 90mph too.

.

It was pretty nice the day I rode it and I've had carb icing before so I know what effect it has. This was richness.

I'm going to stick with spacers for now. Anyone who's after something to do the job, two door stops in black fit perfectly and look great.

Surely it just means that the jetting set up you had was now too rich for the sudden drop in air coming through the system. Doesn't necessarily mean you were getting more power though!

03-01-05, 02:06 PM

.[/quote]

I'm going to stick with spacers for now. Anyone who's after something to do the job, two door stops in black fit perfectly and look great.[/quote]

I commend you or using your head to find a cheap alternative like the doorstops.
I to looked at using rubber but I found that the tank mover around far to much for my liking even with a steel sleev fitted inside and was concerned that the two bolts holding them will be fatigued and snap in time.
That’s why I had some 16mm high aluminium dowels machined plus I add the 2 stainless steel flanged button head bolts in as well.

www.chewys-stuff.co.uk/

northwind · 03-01-05, 02:25 PM

Yup, I just used a couple of nuts until I saw Chewy's ones, and I found a lot of movement too. Though I do like the idea of doorstops, good lateral thinking there

03-01-05, 03:20 PM

I used some alloy spacers cut down from a set of GSXR engine mounting bolts, only about 12mm high each but never noticed any improvement really.

03-01-05, 04:51 PM

The door stops have no moment or tank wobble but might be too high at 3cm's?

How high are your machined bits chewy22?, and where did you get the height from?

03-01-05, 04:53 PM

Quote:

Originally Posted by burner

I used some alloy spacers cut down from a set of GSXR engine mounting bolts, only about 12mm high each but never noticed any improvement really.

I was using 18mm stacked form for testing and the difference was massive out on the road. What jets are you using? Me and Northy noticed significant difference.

northwind · 03-01-05, 06:16 PM

Aye, but I got the difference because I needed it to clear the Rene filter... I might get 2 air/fuel runs done, with and without, when the bike goes up for proper dynoing in a couple of weeks...

04-01-05, 01:34 PM

Quote:

Originally Posted by northwind

Aye, but I got the difference because I needed it to clear the Rene filter... I might get 2 air/fuel runs done, with and without, when the bike goes up for proper dynoing in a couple of weeks...

what do you mean but?, the rene filter is BMC filter is it not?

The 165 jets for the BMC Race RS may still be overkill, I'll need a dyno to prove that fact.

03-01-05, 02:06 PM	#24
chewy22 Guest Posts: n/a	Re: Air supply :: Tank spacers :: Other methods .[/quote] I'm going to stick with spacers for now. Anyone who's after something to do the job, two door stops in black fit perfectly and look great.[/quote] I commend you or using your head to find a cheap alternative like the doorstops. I to looked at using rubber but I found that the tank mover around far to much for my liking even with a steel sleev fitted inside and was concerned that the two bolts holding them will be fatigued and snap in time. That’s why I had some 16mm high aluminium dowels machined plus I add the 2 stainless steel flanged button head bolts in as well. www.chewys-stuff.co.uk/

03-01-05, 02:25 PM	#25
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,082	Yup, I just used a couple of nuts until I saw Chewy's ones, and I found a lot of movement too. Though I do like the idea of doorstops, good lateral thinking there __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

03-01-05, 06:16 PM	#29
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,082	Aye, but I got the difference because I needed it to clear the Rene filter... I might get 2 air/fuel runs done, with and without, when the bike goes up for proper dynoing in a couple of weeks... __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

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03-01-05, 03:20 PM	#26
BURNER Guest Posts: n/a	I used some alloy spacers cut down from a set of GSXR engine mounting bolts, only about 12mm high each but never noticed any improvement really.

03-01-05, 04:51 PM	#27
snoopy Guest Posts: n/a	The door stops have no moment or tank wobble but might be too high at 3cm's? How high are your machined bits chewy22?, and where did you get the height from?