setup;
50cc kstar
high comp head
15 bing, 82 jet. needle at richest setting.
dmp reverse unmodified
case matched
stock 2 shoe, screws turned 720 out
15x45
when i first start the bike it pulls off the line decent, but after running a minute it pulls really slowly til 10mph almost completely bogging out.
it always rips once its on the pipe(about 10-15 mph), the midrange is great, and the top end is pretty good.
any ideas on helping out the off the line pull?
I have a similar setup with a 50 TCCD (similar kit) and had what sounds like the exact same problem. Clutch tuning is definitely the secret to fixing the problem. I had a two shoe with Paz springs tightened as far as they could go and it still would not engage high enough once the motor got warm. I was able to fix the problem by taking a bit of weight off the shoes. Now I have great power all around (and that is with 16x45 gears).
id say tighten your clutch screws but the fact that it runs fine sounds carb tuning to me.
whats your plug chops saying?
Have ya tried just running around with the thing at 3/4 throttle then checking the plug? Maybe the needle is too high?
OR maybe the kits just not even close to broken in yet, and the compression ratio is all over the place and your trying to tune to a moving target? Thats what i always find when i try tuning too much right off that bat. Run it rich and put 100 miles on it?
what type of tranny fluid are you using.
i was having problems with cheap atf. making not slipping as well when it was up to operating temp. i over filled it just a tad and it worked otu better
i'm glad i'm not the only one.
how's the compression? looking at the cylinder with the head off there looks to be quite a bit of room before the piston would hit the head. you could probably take a full millimeter off the head and the piston still wouldn't hit.
i sanded the hi comp head and cylinder ultra flat and got rid of the head gasket. runs a bit better now on the low end, but like i said, there looks to be a lot of room for improvement.
ME TOO!
50 cc Kstar, 14 Bing 72 jet, lowest clip/needle setting, Proma pipe...
Low end BLOOOOWS
Mid Rips!
Im gonna start looking at the clutch as well an maybe case match eventually... im getting lazy :)
50 kstar
hi-comp head
16 dellorto
boss pipe
case matched
2 shoe tightened
15/45 gearing
low end kinda junky
mid rips
tops out at 44mph
im gonna try 14 or 13/45 and see how it changes things, ill let ya know
Shitty low end is in the port map of that kit. It's a top end ripper, and unless you do some serious, serious work, it's never going to have good low end.
^thats what i was thinking too. i ported a stock open port and the low end sucks. but it is a ripper for sure on the top end. but im at 18x40 and that could be an issue too.
I've kind of gotten used to it my set-up is just like crazyjay and sometimes I'll throw in a couple of courtesy pedals to get it off the line but other than that I just kind of eat it
Just gotta do all the obvious stuff you've heard before:
drop to 14 tooth front, mill the head, better clutch springs/lighten shoes, 16 tooth freewheel
or maybe just deal with it being a top end ripper. a little specialized kit like that is kinda a cool one trick pony. Id put blue or paz springs in it and crank em in and have fun
turned my springs in another 360. its better but still adog on low end. gonna turn them all the way in today.
Put a electric hub motor on the front wheel
you are a lil too rich. Downjet. plugchop. Also, try and get your compression around 180 to 210.
Eurokit
del clone 16.5
Uni filter
tecno boss
need at one down from top
66 main
idk low speed
three shoe springs turned out 900
now 14/45 gearing
my low end so so mid and top great
45 gps confirmed
id say its the carb or gearing idk i suck at this stuff still pat sorry:(
i miss richmond
I guess I'm part of the kstar no low end club. It's better when cold but when it warms up I too lose some low end until around 20mph. Then it rips.
Here's my setup
Puch Korado e50
Kstar 50 w/ high comp. head (not port matched)
Dellorto 15.15 with a 70 jet
Currently has biturbo pipe, but had tecno boss pipe. both pipes had bad low end.
Plug chop shows a light to med brown
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