entered a national event in 4 weeks time but last time out my bike was pinking a bit.Reading up on the internet it seems like one of the causes could be build up of carbon. I also read about a tuner in the states that gas flows heads using a sandblaster.

So i thought i could kill two birds with one stone (epecially as it is so tricky to get the push rods back in). This afternoon I took the air filter out and the silencer off, fired the bike up, held it at about 3000 rpm and throw hand fulls of sand into the airbox. most of the sand seems to have come out so I put it all back together again.

Problem is now that it runs really rough. I reckon it so well gas flowed I need to adjust the carb and timing to suit.

I was thinking about going up 20 on the main jet and advancing the ignition by about 5 degrees

Does this seem about right ? don't want to risk damaging my freshly tuned motor.

Edited February 28, 200917 yr by alan

Is it April the 1st already ?

you been serious about the sand into the air box ... oh deeeer if you are

..but it's so well written, I think he's pulling our...you know...

So i thought i could kill two birds with one stone

you missed a trick there, you could have killed three birds with that stone. if you had positioned your slghtly rusty cast iron garden furniture just behind the exhaust it would have nicely prepared for a coat of hammerite.............you didnt think it through really did you?

Please, no, your taking the p*** right?

Was it "silica" sand or builders sand ?.

Hi Guy's,

I tried that a while back, but you need an old Ariel that's running a bit retarded and if you get her nice and hot and fire in the handfulls of silica sand straight into the bellmouth you get a loveley glass vase forming out of the end of the tail pipe, and if you inturupt the flow ,by posititoning your hand momentaraly over the carb she will back fire, and shoot the glass into the air and it comes back to the ground has marbles. PS, you must have an Ariel HT with the factory original exhaust for this though, I have tried sand blasting my best Levi's with this method as well, it does tend to scorch them though. Are well!!!

Regard's Charlie.

This is just a slighly changed version of a spoof topic that did the rounds on the car forums last year.

I wonder will somebody actually try this, God help them, dangerous article

There is all sorts out there

Vinnie

Edited March 2, 200917 yr by Vinnied

Thanks to those that are taking this seriously, (this a 3k serco motor),

I think you are right that I didnt think it through properly.

when I took the plug out the end was coated with glass, hence the poor running?

Peeping through the plug hole I can see the top of the piston is also coated.

So, it seems an added bonus or two. Higher compression and a thermal insulator on the piston. I am now thinking I need even more ignition advance.

The only downside I can think of is the fragility of glass, don't want to undo my good work bouncing off a rock step.

I beleive that glass is toughned by rapid cooling, so I was thinking of firing the bike up, killing the motor, whipping the plug out and then sticking the garden hose in the plug hole.

Any one got any experience of this...

No offence alan, (and i know nothing on this topic!) but it sounds like a brilliant way of ruining your motor.

sticking the garden hose in the plug hole.

Any one got any experience of this...

I love this, really funny thread

Answers to your above question of the garden hose may depend on various readers ideas of 'plug hole' of course....

HI Guy's,

One of the plus sides to using the Silica sand is that it coats the inside of the exaust system with glass and the gases escape cleaner and the real bonus is that it disapates the heat from the exhuast, so no more burnt legs etc, My opinion anyway. Bug*** it might work!!!!!

Regard's Charlie

My original theory for using silica sand was that it is so fine that some of it may get sucked up the valve guides, and thus "tune" the rocker gear. Perhaps "Glasses" guide may have a angle on theories !!