? about Flat Slides..

[Wookie]

A question for all you guys racing with Flat Slides & who are running a ram air set up. After a race or practice session do any of you guys find some raw fuel in the bottom of your ram airbox? I have been experiencing this and while its not alot of fuel, the possibility of a fire is pretty concerning. I know my TZ 250 had a lot of blow back on the over run but I am curious about the ZXR. Thanks in advance fellas.

[jake]

i dunno bout the flatslides, but i get petrol in my airbox from the cv's. does'nt worry me really.

[tk400]

This is quite common with all carbs due to cam overlap. You may want to just check your cam timming but I would say it is OK. You can also get double carburatoin from this at certain RPM's so do you have any significant flatspots. cheers

regards TK400

[Wookie]

Thanks for the reply's fella. I thought it was probably nothing to worry about. The thought of my bike going up in flames is horrendous.

[xlr8_07]

decent trumpets realy help this alot, the fuel vapor stays in the trumpet and thus become part of the tuning, ( this is one of the reasons trumpets are good for a "tuned" rpm )

[xlr8_07]

oh and its not so much over lap that causes this as it is just the fast flowing air bouncing back ( to use rather simple name ) off the vlave one it is closed ( investigate pulse jets for more understanding )

[tk400]

The harmonics involved are much more complicated than a simple open ended resonator. ( see local university for more of an understanding ).