SX-R Issue

[Shonuff]

Sent my motor off to Group K for their big bore 850 kit. I got it back and it really didn't run as strong as I wanted so I installed the TBM lightweight flywheel, removed the timing advance plate installed by the previous owner, and now am hitting a strange rev-limiter like problem at 6,000 rpms.

It feels like fouled plugs but the problem persists with brand new plugs and with different carbs. (I swapped the carbs from my 2005 SX-R and got the same result.

What could be my issues? Is it a timing issue? Reeds? Pulse signal? Ignition?

Alright gurus, get to guruing.

YouTube - SX-R Issue

 

[Big Kahuna]

what ignition are you running?

 

[stanton]

im thinking timing

 

[D-Roc]

yeah sounds like the ignition is holding it back like a rev limiter. weird.

 

[Crab]

You need to find a way to confirm timing with a digital setback timing light. Its possible the TBM is bad?

 

[Big Kahuna]

stick your stock flywheel back on.

 

[Scorn800]

Ignition or timing problem.
What ignition are you running?
Also check to make sure your pick up coil is in the correct position.

 

[Cross]

Might want to trim back your plug wires back a little. I had a similar problem last summer, cheap and easy check.

Brian

 

[mybad]

Are you running the entire sleeper kit or just the 835 cc bore? I have the Group K sleeper big bore also. You need to get that stock flywheel back on. And run the stock ignition.

 

[Shonuff]

stick your stock flywheel back on.

I'll have to steal the one off my 2005 as I sold my 2003 flywheel.

Ignition or timing problem.
What ignition are you running?
Also check to make sure your pick up coil is in the correct position.

Stock ignition.

Might want to trim back your plug wires back a little. I had a similar problem last summer, cheap and easy check.

Did that.

Are you running the entire sleeper kit or just the 835 cc bore? I have the Group K sleeper big bore also. You need to get that stock flywheel back on. And run the stock ignition.

Entire sleeper kit. Why the stock flywheel?

 

[Shonuff]

I'm going to swap the flywheels between the SX-R's to see if the problem follows the TBM flywheel.

 

[Big Kahuna]

Note to Self, do not sell parts that I may need again or at least until after I have tried out this new part.........

 

[Shonuff]

Note to Self, do not sell parts that I may need again or at least until after I have tried out this new part.........

No SHlT!

Ha ha.

Going to get started now.

Thanks again.

 

[mybad]

Entire sleeper kit. Why the stock flywheel?

I asked Harry about swapping the oem flywheel with an aftermarket flywheel, and changing the ignition, but he suggested not doing it. I just had the stocker lightened and jumped the air temp. sensor. He said to run atleast 100octane.

Let us know what you find.

 

[Shonuff]

My lightened flywheel was still sluggish. I wanted more pep. Korn's Vilder flywheel helps his jump out of the water.

I removed the previous advancer plate. (2003) Perhaps I should stick it back on.

 

[Shonuff]

Pulled the TBM this morning.

Did I mention it needed a flywheel puller I didn't have?

 

[Shonuff]

I found two screwed engine mounts on the 2005 SX-R.

:bs2:

 

[Shonuff]

Both bendixes look good and got a full re-lube. Hmm. The date is wrong on my camera.

 

[Shonuff]

The 2005 topped out at 6634 rpms with the TBM installed. Here's a video of the second go around. I now will install the stock 2005 flywheel in the 2003.

YouTube - 2005 SX-R with TBM Flywheel

 

[Shonuff]

I just got the stocker replaced on the 2003 and the RPMs are topping out at 6550 and is sounding like it should.

Damn.

YouTube - Stock flywheel in 2003 SX-R