the jets of winter

[Aviatrixie]

So... I ride my Vino to the Yamaha shop this morning to have ny S1's and windshield installed... sit down on the the sofa in the lobby and tell Steve and Jason (the chief mech and a wrench) about my new stage one kit. Steve's all excited about my Vino... He tunes 2 strokes all the time, but he chuckles when I tell him about Provo and fast Vino's... says he can't imagine 60 mph on my little scoot. So I tell him my stage one is enroute... and he splashes cold water on my face! Seems it takes at least 90 minutes to jet a 2 stroke properly. Parts may be cheap, but he gets $68/hr. He says if he jets it now in this cold air I'll have to come back in a few months to do it again when it gets warm again. I do know I rode once in 3 months last winter. Cold air sux! :(

What would you do?

[XPS1210]

well... IMO yes, you might have to re jet in the spring... however if you are planning on a daily ride in the winter then yes re jet...

If you are mostly waiting till spring and re jet then...

That's why I do my own work... costs to much for labor... heck... buy your own tools with the money you could save and it'd still cost less...

Just my opinion... and if your not mechanically inclined... then it could pay off to have someone else play with it..

[Lennox]

ok. I am not sure where to start. First of all the whole "90 minutes" is a money making line. :mad: There is no such thing as correct jetting on 2-strokes. Elevation, Temp, humidity, RAD (relative air density) all factor into jetting. It may take 90 min to start from scratch. Lucky for you there are people here that can give you a GREAT starting point. If you want a perfect tune, you will have to rejet every day. :rolleyes: Lucky for you it is cool and dry in Pennsylvania right now. Re-jet now! Come spring, and summer the worst that can happen is you are a bit rich. Cool dry air makes you run lean. Hot humid air makes you run rich. If you rejet now, in the summer months you can still ride "worry free" BUT you may go through spark plugs faster.... (cheaper than re-jetting)

Ask your machanic how he is going to determine the "correct" jetting. There are 5 basic ways to tune. I'll tell you in the order of accuracy. #1. EGT (Exhaust Gas Temperature) #2 CHT (cylinder head temp) #3 Tachometer #4 Sound and feel #5 Plug chop. If he tells you either #4or#5 go elswhere!!!!!!

I hope this helps you?? :)

[King Vino]

It took Matt less than an hour to derestrict, jet and do my 300 mile factory service. When I started working for Steve, it took me, completely inexperienced about fifty minutes to do a jet, and that's including everything without any experience other than Matt laughing his tailpipe off at me.

[Aviatrixie]

Thanks for all the info, gentlemen! :)

When Steve told me an hour and a half to tune my Vino that included tuning the variator for best compromise between top speed and hill climbing ability. That will involve disassembling and reassembling the variator as much as 4 times I guess, if he tries all 3 sets of weights and the last set doesn't work as well as a previous set. It seems to me it would make sense to start with the middle set, then try the lightest set. If the lightest set works best stay with that. If the middle set worked better, try the heavy set.

Anyway, I assume the jetting will be done before the variator so the test runs can be made with a properly tuned engine.

And your right, I would think just rejetting shouldn't require any test rides, right? I'm sure they have all the best equipment there, since they are a Yamaha, Suzuki, Kawasaki, and several different types of motocross bikes dealer.

Once again, thanks!

Erika

[King Vino]

I think you're getting a good understandinmg of the scooter mechanics :)

[Aviatrixie]

King, Provoscooter.com and all of the wonderful people here have helped me to understand the mechanics a lot better. This place is a wonderful resource!

[Aviatrixie]

Erich emailed me tuesday and apologized, saying the Next R pipes were on back order but should arrive on friday (today). He promised to ship everything in my kit on the day they arrive. I like that he seems very customer oriented. :)

I got back from Chicago last night and had to scrape thick frost off my car windows. With highs in the 30s right now I think winter has arrived. There will be a few days in the 50s yet I'm sure. I'll have the install done on one of those days.

[marylandmark]

I like that he seems very customer oriented. :)


Very much so and that is why he has such a loyal following around here.

[hybridrazz]

good that your learning sounds like you can save money, more money for the stage 2 and 3.