New to Scooters BWS50 Drvie Question

[labworx23]

Hey, Looking for advice. I recently installed an Athena 70cc BBK, tuned pipe and 19mm flat slide. As well I did put in some new primary bits while repairing the starter gear set. The scooter ran OK last year stock but was low on compression, so I decide to take up my first build. My issue is this on flats and especially inclines the scooter wont get up to full power (the pipe wont hit), going down a hill (not even a long one, maybe 400 yards) will help the scooter get over the hump and achieve power band. The main jet is fine as I've done plug chops, the needle position doesn't seem to make any difference (full lean or rich even with shim). My thinking is the port height is too low, the carb is too big or the there is something sticking in the variator or clutch...your thoughts
PS (35 years on the bench, just not 100% when it comes to scooter CVT's)

[aeroxbud]

What exhaust are you using? A sports pipe will require lighter rollers.
If it's sluggish pulling away it might need stiffer clutch springs. Are you running the standard contra spring?

[labworx23]

fortnine.ca/en/athena-sporting-exhaust-pipe

www.partzilla.com/product/aftermarket/1EE7-ATHENA-P400485110001?ref=9c39b6be1e761b47b08c734acd364153a402aa67

[Zino]

What it sounds like is you are not getting into the meat of the power band
By the look of that pipe I would drop weights in the variator so you spin up farther in the power band
Also run heavy clutch springs so you start in a higher rpm

[aeroxbud]

That variator might come set up for a stock bike. What weight do the rollers have?