Another Question, Sprockets 'n' Fuel economy

wazzawiseman · Post by **wazzawiseman** » Sat May 20, 2006 10:52 am

Ok its time to replace the sprokets n chain off the Duke......
Wondering what the best option would be for fuel economy (because of fuel prices nowdays), and will this also lower RPM while riding.....
if this is correct how much power would i loose and would it be noticable, and if i decided to open the throttle would it still have the kickarse pickup it has now or close enough

do i need to make the sprokets more teeth front, back, less teeth...what do i need to do and what generally are my teeth combinations on the 906 currently and best options in future?

cheers all

wazzawiseman · Post by **wazzawiseman** » Mon Jun 05, 2006 7:27 am

dont know why nobody wants to talk 2 me,

boohoo

Finnpaso · Post by **Finnpaso** » Mon Jun 05, 2006 2:01 pm

Maybe U make too difficult question, cause thjat is just, how U "feel" with bike and how U want drive her :laugh: I dont know about 906, cause i have only 750 Paso and 907IE from Paso series, but in my tuned 907 i have normal 15 in front and much bigger 46 in rear, cause i dont care about economy, when i drive her at all.... I want shorter gearing, that she accelerates much nicer, than with too long gearing... She is much easier also to drive in city traffic now

My 750 dont have so much tuned engine, than in my 907, only open air inlet, 40 Delortos and open/loud exhaust and in that combination normal sprockets feels quite good to 750 Paso. Near all Ducati modellss after 907 are too long gearing to meet EPA, etc noise, consumption standarts, but that is only "fake", what is under Ducati frame.... They are not designed for "normal pipes", etc... Thats why Ducati sells much better pipes to near all modells also... Shortly they are too long geared with normal sprockets... That is my opinon about thing and its very hard to change to other...

Anyway, all depends, what kind of trips You make with her.... If long journeys, then long is better, but if most in twisty roads very fastly and city driving, then one teeth smaler to front or 3-5 bigger to rear......

persempre907 · Post by **persempre907** » Mon Jun 05, 2006 3:58 pm

Hi,
I'm amazed about your requirement.
I wouldn't lengthen too much the gearing.
I've had a 906 and now I've a 907 (same engine).
I agree with you about the high fuel consumption of the 906 (the 907 has less consumption), but I think you first would have to clean and tune the carburetor or try to change it with 2 Mikuni.
I had the Weber on my bike, so I can't tell you about the fuel consumption with the Mikuni, but I think it would get better in all.
You can find more advices to http://www.geocities.com/750paso.
Besides, I think that 3 teeth more on the rear sprocket is the maximum.
Otherwise your engine will run too much low and you can't drive smoothly, either in straight or in twisty roads.
Let us know.
Ciao

Finnpaso · Post by **Finnpaso** » Mon Jun 05, 2006 7:02 pm

Francesco, I LOVE Z=46 in rear in my tuned 907IE...

As i told, all depends, how u want drive and where.... If only long journeys, then normal sprockets can be also good....

Btw, now i can keep RPM there, what it is meant to be, when driving hardly in twisty roads, like 5000-8000... That makes also much cleaner engine, than driving low, like 4000 RPM. I have noticed very many times, that if drive too long time low, then engine doesnt want to function anymore, like should...allkind of problems, when shit inside sylinders and valves... Also very important to clean engine with high RPMs, before start valve adjusting job! In that cleaning very many Ducati owners make big mistake, cause they DONT do it!!!....and then they have big problems to adjust valves with shit between valves and valve seats!!!! I have learned something

persempre907 · Post by **persempre907** » Tue Jun 06, 2006 8:52 pm

Yes Antti,
it's as you say

I've seen that I had bad written about the rear sprocket

.
No matter, as I told, I would mean is better to shorten the gearing rather than lengthen.
The ride is more, more fun and the engine will work better.
The fuel consumption has be fixed only with a good tuning of the carburetor.
Ciao

Finnpaso · Post by **Finnpaso** » Wed Jun 07, 2006 6:59 pm

I noticed that Your "mistake", but i knew, that You correct it very soon... :laugh: Shorter gearing fits to 907IE very well, also same with ST2, ST4 and ST4s. I use 3 teeth more in rear in my ST4s, what is close one teeth in front.... and its still little "long journey gearing", but surely its good to have allkind of sprockets in garrage for allkind of trips!

persempre907 · Post by **persempre907** » Thu Jun 08, 2006 1:40 pm

... and the time for mounting it...

I've time just for a little talk on the web rather than for the care of my bike... :thumbdown: :thumbdown: :thumbdown:
Ciao

Finnpaso · Post by **Finnpaso** » Thu Jun 08, 2006 6:42 pm

It takes about 2 hours to change gearing and no anykind of hurry... Not "so much"!

Here they say, that 90% of Ducati owners time goes to fixing bike and 10% for driving it.... :laugh: I think, its very close, what i have spend time in garrage, but anyway i normally drive about 17000kms/season(6-7months), so wintertime is very good for fix everything again... :funny:

wazzawiseman · Post by **wazzawiseman** » Thu Jul 13, 2006 9:41 am

Thanks for the replkies guys, the question about fuel economy isnt outragious the reson i ask is here in NZ the givenment also has a tax a fuel, the price we pay at the pump the goverment has 60% tax on the fuel, so here it is expensive when fuel goes up so does the government tax that we say, hence the question about trying to save fuel

persempre907 · Post by **persempre907** » Thu Jul 13, 2006 8:47 pm

Don't worry Wazza,
here in Italy the tax on the gasoline are higher than 60%.
Today the petrol is arrived to $ 76, and 1 liter of fuel costs €. 1.40 (about $ 1.70)

:toofar: :toofar: :toofar: :toofar: :toofar: :toofar:
Ciao

Another Question, Sprockets 'n' Fuel economy

Another Question, Sprockets 'n' Fuel economy

anyone have any answers?????