Get some more grunt out of FXR 150?

[Andrew]

My old man runs his old Triumph on racing fuel and AV gas. Perhaps that could work?

[Andrew]

My old man reckons that you can get around 105 octane from it.

[wkid_one]

Hey - that's a nice way of getting posts up - say everything twice

[wkid_one]

PS - isn't race and av gas the same stuff?

[Antallica]

Far out that's pretty amazing

[Marmoot]

If you up your compression (either by skimming the cylinder head, or doing something else to the engine), and if the temperature is right, then avgas or racing fuel is beneficial to the performance.

If you run on 91 just fine, and you switch to 105, there is a chance that the air/fuel mixture doesn't burn properly (burn too slow) hence reducing your performance.

My friend also had this experience, using racing fuel on a standard R1. The performance doesn't improve at all if not went down. It can also be caused by air being too cold.

If you have detonation/pinging/knocking when you open the throttle, then higher octane will certainly give you benefit.

[Antallica]

Yeah I only use '96 from BP... these bikes get quite bastardly in the cold/damp weather though . Ahh well, I'll get my restricted in this thing then once my new job settles then I'll start the search for a new baby.

[Marmoot]

If your bike is hard to start in the winter and you are using 96, try switching into 91 (just for the winter).

That happened to my Blade as well.
It does not burn 98 well in the winter, and in the summer 91 gives some knock and ping.
I use 91 for the winter and 98 for the summer now.

Also, checking your sparkplug might also be worthwhile

[Antallica]

My FXR has no trouble starting (except when I forget to fill up ), starts first time every time. It's a nice bike for a loser like me It loves 130km/h, I love the kick it has when it reaches 8.5k rpm.

Just that cold damp weather it gets about 5-12k slower.
I still have the whiny noise too argh, gotta get it serviced.
*curses budget*

[What?]

Oy, Antallica, if you really want to hot up the 150 AND stand out from the crowd... I remember some years back seeing a Honda (CB125 I think) with a small rootes blower attached. It went pretty quick,too. Until it threw a rod   but hey, how many supercharged bikes live in your street??

[Marmoot]

Try NOS
Performance Bike Magazine once featured CB90 with NOS. They say it was pretty impressive. Sure as hell funny.

[bungbung]

A mate and I nos'd a nifty fifty once.
You know the old soda siphon bottles? Duct tape one of these onto the fairing and run a piece of plastic hose from the soda siphon nozzle into a snug hole in the airbox.

Stuff a garden irrigation plug onto the airbox end of the hose and melt a small hole in it with a hot pin.

Load siphon with a whipped cream nitrous cylinder, you're ready. Gun it down the street and when you're ready for the rush squeeze the trigger.

The nitrous gets dumped into the hose, and leaks slowly into the airbox over about 30 seconds.

This worked famously for about 15min until we cracked the aluminium swingarm/engine case thing and the back wheel bent over on a crazy angle jumping nifty off a hump while on full nitrous chat.

[Duke of Rogan]

LOL!
did any one have a video camera there?

[Coldkiwi]

streuth.. you blokes are making KK sound like a well-balanced and sensible Mr-Fixit!

(I would LOVE to see some pics of a NoS'd CB 90!)

[bungbung]

No camcorder unfortunately, which is a shame. It would have been nice to capture the maniacal laughter when we initially gassed the idling nifty - instant redline revving!