Honda Spree and Elite 50 Forums

Dude that is so slick!

This is way too cool . Thanks for posting rev

That is sweet, should of built it into one of those eletric razer scooter.

I am thinking that my pipe is still holding me back a bunch - so we will see how the super-duper Graphite9 pipe is

Testing this weekend...

Revolutionary wrote:I am thinking that my pipe is still holding me back a bunch - so we will see how the super-duper Graphite9 pipe is

Testing this weekend...

Please let us know how it performs. that's the new polini right?

Got the new Polini pipe in last night and put it on. Just buzzed around the block but it feels good. I made some long runs tomorrow and see how it fares.

Greetings:

Congrats on the Polini Pipe! It's a good idea to pay attention to your RPMs, temperature and plug color right now. The engine's jetting needs have almost certainly changed.

The new pipe picked up but it a bit strange on jetting.

Using the same 98 jets it ran previously 54 (57.9 with fairing), it ran 57.4 so a quick gain already, and it was very responsive. This is with the 21mm OKO. I put in a 102 jet and it acted very rich before hitting the power band, 4 stroking, but when it hit, it picked up and ran 57.9. I put in a 105, the pre-power band got much worse and almost wouldn't get on the pipe, but when it hit, it bumped up and ran 58.4. With the fairing that should be 62-63. So, it acts like it wants more jet, but has trouble getting on the pipe when I give it jet.

As a note, the clutch is engaging about 5200 and then peaking about 9400 before the CVT pulls it down. It runs top speed about 8800.

I tried to part throttle it and see if I could get it on the pipe before going past 3/4 throttle and getting into the main jet, but it didn't have enough power to get up there. What is your best advice? Lower the needle or try a bigger one? Or???

Greetings:

Lower OR thicker needle should achieve similar midrange power improvement.

How exactly do you Tune that Carb with a Turbo ? What is max boost you can Squeeze out of it ?

I set the turbo up as a draw through system. I didn't want to deal with pressurizing the carb and figuring out one more thing. It runs only about 2 psi boost right now getting it figured out.

Hi HP. Is it possible the turbo it sucking the fuel out of the cylinder and pipe?

Mr Wheelman gives great advice. I would lower or raise the needle before I would make any other changes.

I would also compare the RPM's with and without the turbo.

As a note, the numbers I am dealing with right now are without the turbo attached. I want to get this pipe tuning sorted before putting on the turbo with it. I can run it either with or without and it only takes about 15 minutes to swap.

Greetings:

Methinks your jetting will need to be a TON richer once you begin compressing the intake charge air. At the end of the air-cooled era, Kawasaki's 750 Turbo used 4 carburetors. The thing was reportedly a challenge to tune. Imagine that! Yamaha and Suzuki had Turbo bikes too. Turbo Lag was an issue. Honda's idea was to turbocharge the liquid-cooled v-twin from the slow-selling 500, then 650. Again, without computers controlling the mixture, there wasn't much upside in power for all the trouble it took.

Wheel - I believe you are right. I just need to get enough midrange power to get up on the pipe so I can then go full throttle