[Help me with my 300ex]

I have a 2001 trx300ex I bought it not running about 1 month ago and cleaned carb and did a crab rebuild on it and I got it running but it doesn't drive right if you rev it to high it stalls itself I bought a new ignitoin coil and installed (kinda stupid) it ran a little bit better but nothing changed with the bogging. it has a old xcelorator exhaust by dg. with stock main jets I'm waiting to do these till I get it running better. I'm thinking it may be the DIAPHRAGM SET, PUMP but I don't know for sure because there not many videos or posts about them. anyone got any ideas?

 

[SamUK]

If you rebuild a carb then REPLACE everything that can be replaced. It's not a rebuild otherwise!

As for aftermarket mods fitted... Start from scratch, fit all OEM exhaust, air filter, air box etc etc.

The items you already replaced.... Are they OEM or Amazon/eBay China junk?
If the latter, replace again with OEM.

 

[Help me with my 300ex]

I got a oem carb rebuild kit but the ignition coils not oem

 

[SamUK]

Could be ignition breaking down under load, uncommon but a possibility for sure..
Have you checked the diaphragm, is it perished or split?

 

[Help me with my 300ex]

I took the diaphragm out and it has some damage to it so im ordering one today