Post by timberwolfmadcat on Sept 6, 2006 8:27:43 GMT -5
Lets get started shall we
So, you did it this time...... you modified your ruckus so far now it runs like crap whenever you give it gas...... .... regretful....... no probably not, as most ruck owners you love the sound over the performance. My advice, if you have done the exhaust, and you want to get it absolutely dialed in, do the intake as well. The $20 for the airfilter will more than equal its cost for performance.... since you'll be wasting at least 5-6 hours of your life getting it jetted right if this is your first go.
NOTE!!!!: Running rich makes your exhaust sound smoother, running lean gives a harsher sound, youll see what i mean when you get started. This has worked better than temperature for me in deciding whether to up the main or drop it
FIRST THINGS FIRST!!!!
NOTE YOUR TOP END SPEED!!!! This is your goal when jetting for the top end, so please note what it is, so you realize when you get there. Document all things on a piece of paper(Graph paper with a chart works the best). Note each setup and its performance in each of the ranges.
Low end - 0-15 km/h for 05, 0-20 km/h for 06
Midrange - 25-50 km/h for 05, 30-60 km/h for 06
Top End - 55-62 km/h for 05, 65-71 km/h for 06
Some basic guidelines:
Give a go with the main jet suggested for each mod. If you crack the throttle and she gargles and dies.... you have one of 2 options
1) Shim the needle
2) Increase the slow jet
While these 2 appear similar, sometimes they are not so.
A bigger slow jet will make your top end a touch richer, as well as all throughout the midrange, everywhere, and may throw off your main jet. Remember, the first goal is to get the best power and top speed at the top..... the low end can be dialed in later. According to DD, an increase in slow jet equates to ~ increasing the main jet on the top by 1/2 a size.
Ex: 38-85(38 Slow jet- 85 Main jet) On the top end runs at approx a 86 main jet on the top. MAKE SENSE!!!!! GOOD!!!
2) On the other hand, shimming the needle just makes you a little richer off the line. In my experiences for some reason i really notice the difference in the midrange....25-50 km/h on an 05, 30-60 km/h on an 06.
MODS DONE:
Heres just a few suggested combinations to try so you dont start straight out at square 1 when it comes to jetting.... These combo's will probably take an hour or two of time away, which means your still looking at 5-6 hours.
It often doesnt work well with both a shim on the needle and running a larger SJ, as it will dry foul your plug(lots of unburnt carbon on the plug). It can be done, just be careful when running a large slow jet and main jet, or a larger slow jet and a shim on the needle.
If your closer to sea level, try the larger main jets first, higher altitude try the lower jets first.
STOCK JET SIZES
MJ - 75
SJ - 38
06 Needle
78 MJ should be allright. This mod doesnt require a big jetting change, just play around with the main jet till you get the result desired.
Intake Alone
MJ - 82-88
SJ - 35-38
SH - ~1mm
Intake/Exhaust
MJ - 82-88
SJ - 35-40
SH - ~1mm
Intake/Exhaust/Cam
MJ - 82-85
SJ - 35-40
SH ~1mm
I still havent done the overbore yet, but im sure DD will update this when he gets back
So, you did it this time...... you modified your ruckus so far now it runs like crap whenever you give it gas...... .... regretful....... no probably not, as most ruck owners you love the sound over the performance. My advice, if you have done the exhaust, and you want to get it absolutely dialed in, do the intake as well. The $20 for the airfilter will more than equal its cost for performance.... since you'll be wasting at least 5-6 hours of your life getting it jetted right if this is your first go.
NOTE!!!!: Running rich makes your exhaust sound smoother, running lean gives a harsher sound, youll see what i mean when you get started. This has worked better than temperature for me in deciding whether to up the main or drop it
FIRST THINGS FIRST!!!!
NOTE YOUR TOP END SPEED!!!! This is your goal when jetting for the top end, so please note what it is, so you realize when you get there. Document all things on a piece of paper(Graph paper with a chart works the best). Note each setup and its performance in each of the ranges.
Low end - 0-15 km/h for 05, 0-20 km/h for 06
Midrange - 25-50 km/h for 05, 30-60 km/h for 06
Top End - 55-62 km/h for 05, 65-71 km/h for 06
Some basic guidelines:
Give a go with the main jet suggested for each mod. If you crack the throttle and she gargles and dies.... you have one of 2 options
1) Shim the needle
2) Increase the slow jet
While these 2 appear similar, sometimes they are not so.
A bigger slow jet will make your top end a touch richer, as well as all throughout the midrange, everywhere, and may throw off your main jet. Remember, the first goal is to get the best power and top speed at the top..... the low end can be dialed in later. According to DD, an increase in slow jet equates to ~ increasing the main jet on the top by 1/2 a size.
Ex: 38-85(38 Slow jet- 85 Main jet) On the top end runs at approx a 86 main jet on the top. MAKE SENSE!!!!! GOOD!!!
2) On the other hand, shimming the needle just makes you a little richer off the line. In my experiences for some reason i really notice the difference in the midrange....25-50 km/h on an 05, 30-60 km/h on an 06.
MODS DONE:
Heres just a few suggested combinations to try so you dont start straight out at square 1 when it comes to jetting.... These combo's will probably take an hour or two of time away, which means your still looking at 5-6 hours.
It often doesnt work well with both a shim on the needle and running a larger SJ, as it will dry foul your plug(lots of unburnt carbon on the plug). It can be done, just be careful when running a large slow jet and main jet, or a larger slow jet and a shim on the needle.
If your closer to sea level, try the larger main jets first, higher altitude try the lower jets first.
STOCK JET SIZES
MJ - 75
SJ - 38
06 Needle
78 MJ should be allright. This mod doesnt require a big jetting change, just play around with the main jet till you get the result desired.
Intake Alone
MJ - 82-88
SJ - 35-38
SH - ~1mm
Intake/Exhaust
MJ - 82-88
SJ - 35-40
SH - ~1mm
Intake/Exhaust/Cam
MJ - 82-85
SJ - 35-40
SH ~1mm
I still havent done the overbore yet, but im sure DD will update this when he gets back