Need help

[vtrn_raptor]

So this could be my issue. The guy I brought the bike off had pinned the pv and have messed about with the carb to get it to run after changing the piston I realised their must have been an air leak somewhere on the bike as wouldn't stay running. I took the carb off to discover the mixture screw was seized so I replaced the carb the only thing I haven't done is touch the needle on the throttle and left it how I got the bike

[terry.tz]

@vtrn_raptor ok your better off do as @Calum said to you set the carb up as it was stock manual will have all the settings for you

[terry.tz]

@vtrn_raptor but before you go tinkering as I said yesterday start from the top did you replenish the fuel

[vtrn_raptor]

Yeah has fresh fuel in the bike now

[terry.tz]

@vtrn_raptor have you checked I know this is silly and I know I'm contradicting myself but considering I think its rich but check anyway is the fuel flowing fine from tank to carb

[vtrn_raptor]

Yeah it is, is this In the correct position

[terry.tz]

i think that is yes but you should check manual

[vtrn_raptor]

I've come to the conclusion something is wrong with the carb as wasn't having this problem with old carb but was running to lean that's the reason I got this one that's probably why I got the carb so cheap ..........

[Jens Eskildsen]

My clip is in the middle, yours is a noth lower, which raised the needle, making it richer.

[terry.tz]

@vtrn_raptor have you documented the setting on the carb before you started playing with them

[vtrn_raptor]

The first carb couldn't check nothing as mixture screw was seized but with this one everything was set up how the Haynes said but looking at the carb compared to the old one theirs pipes missing it's got aftermarket hex screw holding the face on and what's worse is the kid I got it off kept his Dt and claimed the carb was a spare so was probably broke when I brought it can't really complain though only paid £25

[terry.tz]

@vtrn_raptor so why did you think it could be the needle then

[declan]

@terry-tz might be missing something but given everyone is suing rich why didn't he adjust the needle to suit mine was lean and runs much better on the lowest needle clip?

[terry.tz]

you keep rushing into things and you're gonna be chasing your tail like a jim carrey nut job a long time before that bikes fixed

[terry.tz]

@declan personally I don't think he should even have it open yet but I'm no expert

[terry.tz]

also, it's showing symptoms of rich running from start up before needle and main jet so it probably not the needle anyways

[Calum]

Needle clip position isn't going to make it run as rich as it is.

Get that carb bog stock.

Stlck needle, stock position, stock air screw stick idle speed.

It's running way too rich, but at wide open throttle it is only the main jet that you are concerned with. So why even bother with the needle position when it is not running right at wide open throttle.

[Jens Eskildsen]

The needle overlaps both bottom and top end, so will fuel height in the carb, verify that its stock.

[Calum]

@jens-eskildsen But once its wide open throttle, the needle is clear of the main jet thus no longer part of the fuel metering process.

[Jens Eskildsen]

Try yourself mate, if you have a clean reving bike, I can promise you that making big changes to the needle will also affect just of idle, and WOT aswell.

I had tonnes of issues due to the PO messing with the carb, so I've been all over this quite a few times.

2-strokes are just very sensitive to jetting, half a notch on the needle on mine will make the bike go from runnning from okay to great.