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Skinners Sprint Micra

l_jonez said:
Think mine will get opened out a little but I need a smaller pilot jet aswell. Without having my own rolling road its a case of trial and error with educated guesstimation along the way. Really want to find a dynojet needle kit aswell.
Click to expand...

I think I need bigger pilot jets, are they available ? It's just I've wound mine out all the way and still getting lean readings
 
l_jonez said:
Think mine will get opened out a little but I need a smaller pilot jet aswell. Without having my own rolling road its a case of trial and error with educated guesstimation along the way. Really want to find a dynojet needle kit aswell.
Click to expand...

I seem to be getting good AFRs at idle, cruise and half throttle it's only full whack that it's mega rich, I'll just have to see what the new jets do.

I'm sure I've seen dynojet kits online but so far only from the US, if I can find a kit il send you a link mate

P.s have you had the needle out if your carbs, I couldn't see how they come apart from the diaphragm when I had a quick look
 
Use one off the black screws from the diagram covers, screw into the needle, then use long nose pliers to pull out, luckily on mine, I have adjustable needles.
 
pork said:
I think I need bigger pilot jets, are they available ? It's just I've wound mine out all the way and still getting lean readings
Click to expand...

Yeah they can be found on eBay etc. From reading online if your mix screws are more than 2.5 turns out then bigger pilot jets are needed.
 
Skinner_87 said:
I seem to be getting good AFRs at idle, cruise and half throttle it's only full whack that it's mega rich, I'll just have to see what the new jets do.

I'm sure I've seen dynojet kits online but so far only from the US, if I can find a kit il send you a link mate

P.s have you had the needle out if your carbs, I couldn't see how they come apart from the diaphragm when I had a quick look
Click to expand...

I think we're all using different carbs but the principles are the same. My needles just pull out.
 
l_jonez said:
Yeah they can be found on eBay etc. From reading online if your mix screws are more than 2.5 turns out then bigger pilot jets are needed.
Click to expand...

Sweet! I've wound mine to the last thread and still to lean.
But they are off a cbr 600 in a 1000 cc engine.
 
l_jonez said:
Think mine will get opened out a little but I need a smaller pilot jet aswell. Without having my own rolling road its a case of trial and error with educated guesstimation along the way. Really want to find a dynojet needle kit aswell.
Click to expand...

Nice read up, I could try I higher needle clip height, but still defo need smaller main jet
 
pork said:
Use one off the black screws from the diagram covers, screw into the needle, then use long nose pliers to pull out, luckily on mine, I have adjustable needles.
Click to expand...

Brilliant thanks bud il give that a go over the weekend, I'm hoping mine are adjustable too! If not il see if I can shim the needle as needed
 
Skinner_87 said:
Brilliant thanks bud il give that a go over the weekend, I'm hoping mine are adjustable too! If not il see if I can shim the needle as needed
Click to expand...

Mine are from the f4 model, before they went efi, which was about the year 2000-2001.
Which year carbs are yours?

I only found thAt trick out by playing and poking things lol
 
pork said:
Mine are from the f4 model, before they went efi, which was about the year 2000-2001.
Which year carbs are yours?

I only found thAt trick out by playing and poking things lol
Click to expand...

Mine are from a 900cc CBR fire blade mate (1995 I think) really good nick for the age!

Being I live on the Isle of Man (of TT fame) there must be some bike tuners I can pester over here for some advice just hadnt got around too it
 
You don't know till you ask :)

The needles go in, so they defo can be removed, been on a few cbr forums and shims should work fine if no adjustable parts
 
pork said:
You don't know till you ask :)

The needles go in, so they defo can be removed, been on a few cbr forums and shims should work fine if no adjustable parts
Click to expand...

Sweet I'd been watching a few YouTube videos on different setups, will sign up to the CBR forum for a read as well.

I should stop reading and just start tinkering like you guys eh :)
 
Skinner_87 said:
Sweet I'd been watching a few YouTube videos on different setups, will sign up to the CBR forum for a read as well.

I should stop reading and just start tinkering like you guys eh :)
Click to expand...

Haha, they both have there merits, I'm the opposite, I tinker, mess it up, then read how I'm supposed to do it!
 
Little bit of painting today while the carbs are off awaiting jets , slam panel & strut brace drying at the minute

image_zps90d829f1.jpg
 
l_jonez said:
Think mine will get opened out a little but I need a smaller pilot jet aswell. Without having my own rolling road its a case of trial and error with educated guesstimation along the way. Really want to find a dynojet needle kit aswell.
Click to expand...

Looking around for Dynojet kits (after looking up the part number on the DynoJet site) i came across these mate:

http://www.motorcycle-road-and-race...cbr-900-rr-fireblade-92-95-stage-p-60049.html

They may stock the right jets for you as well :)
 
Correct rocker gasket fitted, big thanks to Stani

image_zps50c5effa.jpg


New jets fitted as well AFR's looking better 12.5 to 13 at full throttle... Not a very quick test the ... Yoko's and rain are not a happy mix!
 
Hillclimb entry list received today... im car number 85 with a 1.4 Nova & 1.6 Pug in my class... big entry list this year & il be rocking the 3rd smallest engine of 80 odd cars :cool:
 
Well today went well at the sprint, two slippy practice runs in the afternoon & I was marginally quicker than last year. Had a look over the in car footage for some tips, 3 runs tonight and I was 3 second quicker again! Chuffed with that :) pics and videos to follow over the weekend
 

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