Derbi senda running oddly

[derbirider96]

Hi everybody so i have a Derbi senda DRD pro 2006 with a 2005 senda xtreme engine.
So basically i rebuilt the engine and it was running like a bag of shit so i swapped it back to the old barrel, replaced the plug, fiddled with the timing a bit, after doing all that it was running semi ok, i had to run it on half choke otherwise it wouldn't have any low down power at all so i decided to take take it for quick run up the road it was running ok still got it up to 10,000rpm in 4th gear and tried to change to 5th and lost all power so changed back to 4th and it was fine and just as i pulled into my drive and it started doing what it did before i swapped it back to the old barrel etc so basically when i rev it, it goes mental, revs up to 13,000rpm so i kill it to stop it damaging the engine start it up and it idles fine if i blip the throttle the rpms just start randomly climbing.
somebody said i may have a to smaller jet (73 main 32 idle btw) but ordered one from ebay for my carb and it didn't fit.
Ps i use my bike for college and work so need to get it work asap so any suggestions help full Thanks

[nathan k]

[derbirider96]

Hi I changed the timing by rotating the stator plate 23 degrees so it was firing just before TDC.

Yeah i think i may have bought 5mm instead of 6mm my bad lol.

In regards to the exhaust i have a race expansion chamber with a tecnigas pipe and end can.

The bike when i bought it, when it had the 2006 drd pro engine fitted it had a 90 main but that was with a few mods, with the engine i have now that jet was way too big and was like running on full choke all the time.

The carb is 17.5mm and i will take it off tomorrow and give it a good blow out with the compressor.

[Nobby the Bastard]

Running oddly? How do you tell?

Rotating the stator plate by 23 degrees will certainly make ot behave oddly...
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Triumph Sprint ST 1050