Lazy 96

[cmotodad]

I have a 96 500 motor that seems lazy on the bottom. The jetting is very good, starts easy and runs clean. Is there a way to help pick up the bottom and make it smooth at the same time? Anyone with experience on Roosty or Eric Gorr engine mods? Not really wanting to spend a ton of cash at it. Thanks

[Roostius_Maximus]

Without doing the whole engine cases and everything i did a cylinder for AlisoBob, should ask him what he thinks of it, theres definately some guys with Gorr work on here that'll give a review too.

[AMA714]

Im having the same issue. Bottom seems a touch burbly, then hits super hard. I am running 1369 needle top clip position, 52 pilot, 170 main. Stock engine, PC pipe.... Just want it to be able to lug it through a corner and not need to clutch it to get up on the pipe... lol.

[Mik329]

That's exactly what I used to get when I put a PC pipe on my 85 thru 88 500's so I gave up on them and just stick with FMF. Never tried a PC on my 90's motors.

[seanmx57]

I have a 96 500 motor that seems lazy on the bottom. The jetting is very good, starts easy and runs clean. Is there a way to help pick up the bottom and make it smooth at the same time? Anyone with experience on Roosty or Eric Gorr engine mods? Not really wanting to spend a ton of cash at it. Thanks

What pipe are you running?

I hate the low end pull of a PC pipe. If I wanted to clutch my bike to get it to go I could just ride a 250

When you talk about lazy low end are you talking about at partial throttle settings or hammer down?

[cmotodad]

It has a PC with a stock PJ carb with good jetting. Roll on out of turns is lazy. This bike is a mx bike for practice. I would like it to be more like the 450 exiting turns

[seanmx57]

with that pipe you will need to touch the clutch to perk it up on corner exit. Gnarly pulls hard much lower rpm. Takes a very fast track to miss the high rpm pull of a PC. I've swapped back and forth a lot. Always end up back on the FMF. If you can get your hands on a fatty you would be quite happy as well. Even a stock pipe would be better than the PC down low.

[cmotodad]

I have a fatty that needs to be straightened. Does anyone know of a good shop to fix this pipe? Thanks

[2strokeforever]

Im having the same issue. Bottom seems a touch burbly, then hits super hard. I am running 1369 needle top clip position, 52 pilot, 170 main.

try diffrent needles, there only $5.05 from sudco, im having good results with a #7 slide and 1370 needle, 39.5 pwk

[seanmx57]

http://www.fusiononeusa.net/BeforeandAfter.html

[CR500PHIL]

That's exactly what I used to get when I put a PC pipe on my 85 thru 88 500's so I gave up on them and just stick with FMF. Never tried a PC on my 90's motors.

My 85 (1997 frame) pulls like jet right off idle - hard to accelerate without pulling up the front end and ripping the back tire off. I have a PJ with low boy Gnarly and 89+ reed cage with super stock reeds. Now that I have a 250 ignition it will perhaps be worst - cannot wait to try this weekend.

[Mik329]

That's exactly what I used to get when I put a PC pipe on my 85 thru 88 500's so I gave up on them and just stick with FMF. Never tried a PC on my 90's motors.

My 85 (1997 frame) pulls like jet right off idle - hard to accelerate without pulling up the front end and ripping the back tire off. I have a PJ with low boy Gnarly and 89+ reed cage with super stock reeds. Now that I have a 250 ignition it will perhaps be worst - cannot wait to try this weekend.

I hear ya, I went from a CR250 to a 500 in 1985 and I'd be embarrassed to admit how many back fenders and bars I went through trying to ride that thing wide open like the 250.

[coley13]

try a rad valve

[TYSTYX]

try a rad valve

The stock reeds and cage work the best IMO. The stock pipe too.....it's power spread is right in the middle of the Gnarly and the Pro Circuit.

[coley13]

OK, i suggested RAD valve as it comes on earlier and smooth aswell. Like the original question entailed.