Did some stuff and now I....

[GT @ oh.]

Update.......flapper adjusted all the way.....gained a little more throttle and r's..... up to maybe 9's ....but seemed to suffer a bit at lower r's..... and still wont climb nicely to redline.........checked to make sure the mains were correct and clean .....they are......soo I guess the carbs have to come off >:(... and apart :(.......again >:( .....I guess if you want something done right you have to do it yourself......I'll probably wait till the season is over...... since that is pretty soon........ and its still running well enough........any other options at this point I should know about???

[Lucky]

The disk shaped filter for the modded carbs is there because the passage in the top of the carb is blocked off if you look at the tube type holes in the top of both carbs you will see that the front one is closed off with a brass B-B.

the passage is drilled an taped with a fitting & goes to the disk filter.
Yamaha decided not to take air for the main on the front carb from the airbox with the update, but instead to take it from outside, hence the filter. perhaps the air was too unsettled or low pressure because of where the flapper is, or maybe because there was blow-by oil getting into the main, dunno why...

--Lucky

[GT @ oh.]

I would says its running about 90% now......3/4 throttle and getting a solid 9k rpms ...which is basicly time to shift.....so it seems to have been running rich......I have the pilot screws set in CW as far as they could and still idle nice......seems to be best setting.......I'm considering putting this 120 in the front and putting the front 122.5 in the rear.......what do you guys think???.......I'm wanting better gas milage truthfully..... not speed......since I hear numbers like 180's till reserve...... and I'm more like 120-130 (two aboard)......seems worth a try :-\.....but would like your advice :).

[h2olawyer]

I hit reserve once at 110 miles, but that was while I was doing lots of carb fiddling.  Quite a bit of idling time.  I normally fill the tank @ about 100 miles.  Went to 135 once this summer & didn't hit reserve.  I have always seen 43 MPG with my V ever since I bought it.  Doesn't seem to matter how I ride it, either.  Sedate, go for it, stop & go traffic, highway cruising.  On the highway, going around 65 - 70, it does a little better, but still definitely under 50 MPG.  Your 120 - 130 miles before reserve isn't uncommon - especially two-up.

I tried smaller jets in mine once.  Got a real bad stumble I couldn't get rid of.  However, I'm at 5,000 ft. elevation & 99% of my riding goes up from there.

H₂O

[Rick G]

I gassed up a block from home and rode up I 5  past Portland  accross the Columbia river  and headed east  to the Motocross track at Washougle  WA. On the return trip I went back doem I 5  (running 65 mph )  and got off I5 and used back roads  (went on reserve  just after getting off the freeway)  Just as I came to the only stop sign  in Sublemity OR .town next to where I lived in Stayton) It went on to 1 cylinder . I chugged accross the street and filled up 4.2 gal. and 211 miles  not quite 50 mpg.