Full exhaust, Shims and Snorkel removed. Dyno run.

5153 Views 17 Replies 9 Participants Last post by Racer X, Oct 21, 2008

Felix

Discussion Starter · Sep 20, 2008

2

Ok well as most of you know I did a full Area P carbon fibre exhaust, raised the needles 0.06 and removed the snorkal. Been running it like that for few km's now and the bike had its first service today and dyno run.

So a ball tearing, wheel smoking 29.4hp. That translates to a increase of 22.5% if the stock figure was in fact 24hp. Not a very pretty curve at all, and by the looks of it pretty lean. Anyone with the know like to comment? Fuel was Aussie 91 octane.

I'm thinking jet kit next. But for now I might just whack the snorkal back in.

My last dyno run was 383hp, bit of a step down

Felix

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1 - 18 of 18 Posts

StockWall

· #2 · Sep 20, 2008

Are you gonna add a shim? Or just jet it?

headhunta252

· #3 · Sep 20, 2008

Just put my snorkel back in

its a little bit of a mofo to get back in...

Felix

Discussion Starter · #4 · Sep 20, 2008

Snorkal for now, but jet kit long term. Just need to decide if I do it, or get someone else to.

Felix

Delta107

· #5 · Sep 20, 2008

Felix said:
Snorkal for now, but jet kit long term. Just need to decide if I do it, or get someone else to.

Felix

I would pay someone else to do it. Unless you know 100% that you can do it.

Kattemissen

· #6 · Sep 20, 2008

you need a dyno-jet kit, the bik is from the factory set to too litle fuel(emmision isues) and when you put a open exhaust system on, it runs too thin....Dyno-jet is the way to go ! mine with new airfilter has 33,6 hp

headhunta252

· #7 · Sep 21, 2008

i had to take out the snorkel again coz the engine is starving for air about 8k but its running well now so im happy for now

Felix

Discussion Starter · #8 · Sep 21, 2008

Its not mega lean, and I cant feel the shortage of fuel. But that said, I think I will still be getting a jet kit and re dyno. Especially If I turn the bike into a tracker.

Felix

headhunta252

· #9 · Sep 21, 2008

yeah i think rejet will be the way to go, just dunno if i wanna spend to much more one the bike, as its running well atm coz ill be upgrading in a year or so

but hopefully resale will still be good especially with full zhorst

Turblown

· #10 · Sep 26, 2008

You're only too lean in the 6500 to 8000rpm area, you can see it in dyno graph also( power dips down). Almost everywhere else its too rich. You want to be around 13:1 to 13.5:1 for the runs...

Felix

Discussion Starter · #11 · Sep 26, 2008

So what you reckon Turblown, how could I smooth that out and richen it up in that spot? Think needles would make much difference? More shims?

Felix

redrider

· #12 · Oct 2, 2008

Like turblown said, you're only too lean in that one spot, and the a/f ratio looks like its going as lean as 14.7 at 7500rpm. That may be where the needle is fully open but the main jet isnt putting out enough. I dont think any more spacing on the needle will help.

Honestly if you want that nice flat curve then you would either need lots of time messing with different jets...or fuel injection.

Nice run though!

Felix

Discussion Starter · #13 · Oct 2, 2008

Thanks for the input guys, good to see you over here kkim.

14.7 is lean, but its not super lean right? not going to do long/short term damage?

Its just clicked over 2000km, I'm running it on some BP Ultimate, which is higher octane and has a bunch of cleaning additives in. Just giving it one tankful see if the bike feels different.

Felix

Felix

Discussion Starter · #14 · Oct 2, 2008

Three 0.02's on each carb.

Felix

Felix

Discussion Starter · #15 · Oct 2, 2008

Yeah I cant 'hear' any pinging... and with the higher octance in today, no change in noises. But it is hard with the AreaP to determine any engine noise. It 'feels' ok through the revs, no lag spots etc. I might hunt for some more washers and give that a shot next weekend, got a pretty big weekend of modding planned for this one. Dont think I can squeeze in re-shimming to.

Oh and give the screws a turn to I guess, it would be better to get it back on the dyno afterwards, but its just finding the time.

Felix

bhof

· #16 · Oct 21, 2008

did the bike run better on bp ultimmate?

Felix

Discussion Starter · #17 · Oct 21, 2008

Not any noticable difference. I'm now looking at some jet kits... then back on the dyno.

Felix

Racer X

· #18 · Oct 21, 2008

I think a thinne mid section in the needle. check out the chart from whoever is selling the parts . there are thousands of choices. you can finr tune it from the chart there.

1 - 18 of 18 Posts

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