Aerox accleration issues

Hello there everyone,

First time poster from Australia.

I have a bit a soft spot for Yamaha Aerox's... i actually have 4 of them. 3 of them a fairly standard, but the one i am having problems with is the modified one.

mods:

S6 streetrace 70cc
S6 pro replica pipe
Malossi Multivar (3.6g rollers)
Polini belt
s/charge adjustable clutch, with red springs
Polini 28kg Torque spring
19mm Dellorto (105/50 jet settings) air/fuel mixture 3 turns out.
Malossi air filter in std air box (snorkel removed)
std reed block/ std reeds
fuel tap (removed vaccum fuel lines)

The problem i am having is the initial take off. It bogs down until about 15mph and then hits power band and then runs sweetly after that... infact it does well doing around 110klms/h.

I have adjusted the clutch to the stiffest setting with red springs and it still wants to move off the line real slow while its bogging down.

I have tried different jet settings etc and running out of ideas.

Please help if the info above helps

thanks in advance

 

I would love it to do power wheelies, but its far from that as it stands

 

Check out the condition of your rear pulley, and maybe try a stiffer torque spring.

 

Actually, it could well be the fact that you still have standard reeds. Try some of the polini carbon ones that fit the standard block

 

I have a Malossi red Torque spring... should i try that???

I actually lied, one of my std reeds broke, so i replaced only one side with a malossi carbon reed. So one side is a std metal reed and the other i the Malossi carbon reed.

 

Yeah try that spring mate.

My aerox bogged to 30mph when I got it, so I changed the torque spring and it runs great now

 

ok will do... so it doesnt sound like carby issues??? I would have sworn that was my problem... but then i never understood why the bike was moving when the clutch is 'INSANELY' stiff!!!

 

Okay so try setting off at full throttle, and just before it's about to stop bogging, turn off the ignition.

Have a look at the plug and see what colour it is

 

ok... just went in the garage and changed the torque spring to the red malossi one... drive pulley looks good, I also put the Polini steel sleeve on that goes on the original torque spring sleeve... it must tension up the spring even more by shortening the travel of the spring... (not sure what it does really) ... but anyway i stuck it on.

Only thing is I cant test ride. It's nearly midnight here and she would wake up the neighborhood. Will try in the morning... will also try checking the plug also... thanks for your comments FiddyRox

 

I'm guessing youre from Australia?

So how are are finding the streetrace kit? What's acceleration like compared to standard?

 

yeah, from the Gold Coast, Oz

The streetrace is excellent, and i love it. Acceleration (when the band cuts in at 15mph) is very very good, and it is very powerful midrange.. especially seeing most of my riding exists aroud the 60-85klms/h... overtaking cars doing 80klms/h is absolutley no problem... Our roads here on the Gold Coast are quite open and flowing, so top speed is very beneficial and a must... As much as I would love to pop wheelies down the street, top speed means more to me. I really like the S6 pro rep pipe as well, very nice sound

 

Knew it from the minute you said Carby

I'm thinking of getting a streetrace kit, but I might go for the sport pro. Can't decide tbh. My bike is pretty quick to about 40mph but then it stops accelerating so good, tops ou at 60mph but takes ages to get there

 

ha ha!!! yeah yeah good ol' Aussie slang!!!

Yeah the streetrace screams to 60mph... its very vey strong!!! I was kinda limited to what 70cc kit i got, cause i wanted to keep the std 10mm crank. Is the Sport Pro a 12mm or 10mm pin?? I'm trying to get Stage6 parts out of Germany at the moment but stage6 products seem to be very few and far between. What is the stock like in the UK??? Who can you recommend to get stage6 cylinders, exhausts, parts etc ??

 

Pedparts.co.uk are great

 

I run a streetrace 70, top racing (doppler) crank, 17.5 dellorto with 82 main jet standard airbox with snorkel removed and malossi filter.
Pollini carbon reeds, pollini high speed variator with 4g weights. I'm not sure how the clutch is set up as I bought it second hand off fleebay. It has blue contra and clutch springs? and each clutch shoe has been marked with it's weight ( balanced) somebody spent some time setting it up and it works beautifully .
The bike pulls wheelies straight off the throttle and keeps up on the throttle alone. it blows all of my mates 50's into the weeds and is as fast as most 125's.
For everyday use the bike is brilliant and very reliable and in my view it's a great set up.

 

Well I changed the reed block today for a MALOSSI version with carbon reeds... definitely made it more punchy... but still don't understand why the clutch takes up so early. Already have red springs in a motorforce style clutch with the adjusters nearly at full reach...!!! What next???

 

Here a pic of my bike, just for interests sake... I should stick it in the members ride section//

 

That's awesome, I'm literally just about to do a polini replica paint job on mine! Thinking of going all white though, not sure

 

Have you checked that the clutch springs have t been broken? if just one of the shoes had a broken spring it would engage really early.

 

yeah did an inspection of it all last night... the clutch is only about a month old... springs are all in good nick!!! Hmmmmmm!!! :/