running rich?
 

i think my curvy might be running a bit rich, i have just fitted a bmc road filter and 144djs and i think my power in lower revs have gone a bit. would this happen if it were running rich. thanks

Have you had it on a dyno?
What did you set the air screws to?

Re: running rich?
 

Go for a short run and then come back and remove one of the sparkplugs - if it is running rich it will look sooty. The Haynes brothers have very good photos of what a spark plug looks like under certain conditions. What is it like on startup? When it's cold do you need choke or will it run ok with little or no choke?

I believe that the air screw really only affects tickover and maybe no throttle revs.

http://faq.f650.com/FAQs/Photos/Carb...RejetRange.jpg

More or less like this the different effects are.

More info
http://members.optusnet.com.au/sv650...ting_Notes.pdf

http://www.factorypro.com/tech_tunin...m_engines.html


After K&N + Leovince + Dynojet I referred to Oz Mick instructions and couple of other sources and was able to get the SV vorking OK.
Now on spring i will take her to dyno for more accurate adjustment.

Got this result
http://www.moottoripyora.org/kuva-al...655%20copy.jpg

The easiest way to know if it's running rich or not is to stick your nose in the exhaust when it's running. A strong smell of petrol will tell you all you need to know.

i think i might be ok, i cant smell any petrol. i thought it might be running rich as the dynojet instructions say that dj 144s for a full system and k&n and i am running 144s for a bmc road filter, raised tank and de baffles blue flame can.

The DJ instructions are all balls though :) IMO ;)

Here we go again :lol: :wink:


Ben

Can you list the recommendations for Main jet for the various options. IIRC, the mains you have got in are are too big(I could be wrong but it's been ages). You've only got an end can baffles in or not.

Does the BMC road recommend rejetting with the filter? Did you raise the needle?



Ben

If i remember correctly i have the biggest mains the DJ stage one kit has and air scres are 3 or 3,5 rounds open. Leovince SBK II without the noise killer.

Some times an occasional back firing when i ease the throttle, but seldom.