MOPED ARMY

James,

Mentioning the model and year of your ped is allways a good idea if you want to know what size carb jets others use.

You can determine if your main jet is too big by doing a high speed plug chop but make sure your air cleaner is in good condition or remover first.

Ron

Glad you liked the title Brian, that's about as Biblical as I get! :)

Thanks for clearing up the "Europed" thing also, Fred.

I changed the plug over the weekend along with cleaning the air filters and changing the tranny oil (it was black and watery.-Eeuuww!). I had leaned the jet needle one notch, and sure enough the plug was a lighter tan than the one I'd removed a while back. It still looks healthy though, less carbon depositing also. The ceramic did have a small circular defect though, like a piece had broken away. The plug has the ceramic slightly further out, unlike the first one or the one I'm using now, so perhaps it's a matter of exposure.

The only problem I can see for a plug chop is that full throttle and top speed aren't the same thing on my machine. I can get it to its' top speed of around 75Kph(47mph) by using half throttle. I generally increase to just over half, the RPMs building up, then drop it a tad and it accelerates to its max speed. It will sometimes "stutter" at around half, but less so now that the needle is leaned. Opening the throttle full gains nothing in speed, unless it's on an incline or I've got a pillion. Then I can sometimes get a "surge" to top speed. With two people, this surge usually "stutters", pulling forward and back.

I know at what throttle position the main jet should be effecting it at, but I'm not certain if my higher speed is done on the needle or the main. It seems to be more in the needles' range, which coincides with the "leaner" plug.

All of which makes it bloody difficult to be certain of what's going on in there. Anyone got a VERY small camera? (Or should that be camel?)

:)

Regards,

James...

"One hump or two", I like that :)

Fred wrote:

Excellent, we're probably on the right track so.

Which is why I thought my throttle setup was so weird. More twist should equal more power AFAIK.

Actually, I did that last year. When my air filter box lid was stolen, I replaced it and first began noticing a flat spot. The shop suggested that test, and when tried, the machine took off down the street. Was only a short test however, no more than 150-200 metres. I've still got "fiddly" throttling to this day. Then again, it had only been derestricted a short while before the theft, so it may have had the same "spot" before as after.

It's my plan to replace the entire air box before I do too much fiddling, remove the filter "variable", so to speak Even so, the fact that Suzukis' own manual has no other model of this machine with such a big main jet is telling. Perhaps the dealer fiddled with it when he installed the carb heater....

I'll start looking into that.

Need to avoid that! This thing is my ticket to work. Otherwise it's out of bed at 5:30am to arrive in work at 7:45amshudder, as opposed to getting up at 7:00!! Did that for 3 years, don't wanna do it again....

Nice idea, a "filter press" of sorts :) I've just cleaned/reoiled, so I'll be sure to check I didn't overdo it.

Thanks to everyone for their ongoing help BTW, I usually don't get replies on Usenet, or the enjoyable conversation!

James...