Strange transmission issue - Yamaha neos (Minerelli 50cc AC)

Hey.

I have a 2001 yamaha neos, which is fully restricted (exhaust, variator) which goes around 56 clock speed.

I have fitted lighter rollers, 4.5g instead of the standard 6.5 :msn1: which makes the acceleration a load better, and the revvs actaully stay steady throughout the power, with this setup its nippy enough for what I use it for, and reliable.

But I have noticed, when you accelerate, upto 7mph it goes very slow, hardly revv's, then it will suddenly revv up and power up to about 50mph clock speed. Anyone know what this is?

And also, if have my transmission apart, when I put it back together, it runs really well etc, but after about 70miles it will take longer to accelerate etc not revving as much, but if I simply take the transmission cover off, undo the cutch and variator, take these off, then put it all back together it will run really well again, so like WTF arc:

Anyone got any ideas or help/advice?

Many thanks

 

just to add, when i take the tranny apart and put it back together, its still slow upto about 7mph.

 

clutch springs ?

 

Does the bike rev quite high when on the spot until the clutch bites?

 

nopeee. but like i brought some from beedspeed, like +15% +45% and + 70%, ive tried all of them and stock and theres like no difference but i was thinking it was the springs, but its just strange. any know about the decrease in performance?

 

tbh, thats what i thought, becuase wen it gets to like 7mph it's at the revv's where it just pulls and pulls.

so i need some springs, anyone got a set spare, or what shall i get, i think the ones from beedspeed are shit, how can i know which are going to be stiff enough? i dont mind them being a lil bit too stiff either

and will a contra make much difference whilst ive got the clutch apart?

 

would these work?

http://cgi.ebay.co.uk/YAMAHA-Aerox-...VQQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247

my idles 2000rpm lol

 

a box of clutch springs with 3 sets in are a about a tenner of pm tuning. get them and try each set until you find a set that works well :beer:

 

yeh. i brought some from beedspeed and wus still shite, i think they was shite springs, but i havnt really got £10 +p&p to spend on them

 

its the only way you can sort it out , nobody can tell you exactly what spring to get just like jets and rollers

get a job

 

i got a job,. but i spend money on other stuff

its so much hassle doin clutch springs, jus wana throw one set in

will i need to change the jettin as its re'ressed?