Is that the correct plug for a climber ? Thopught most trials plugs had a projected nose, making them run hotter to burn the crap off. I'd check that first.

I'd go for a bp5es ngk

Edited January 26, 20206 yr by b40rt

It's bp7es which is standard.

Update ! I've ordered a brand new dellorto carb with recommend jet settings from the factory I'll let you know if that sorts it this week thanks for all your help so far 

Edited January 26, 20206 yr by gasgasrob

9 hours ago, gasgasrob said:

Update ! I've ordered a brand new dellorto carb with recommend jet settings from the factory I'll let you know if that sorts it this week thanks for all your help so far 

Well, may be it's partly the carb and then most likely the jets and nozzels which where replaced by wrong elements or in wrong sizes.

A worn out carb can also be the case,especially the body which is too the cylinder and the slide, but that takes quite an effort or a wormn slide that has been used too long and rattled beside hiomself the cylinder too to oval shape ... 

Can you tell us please your carb set up:

- slide number (on the bottom of the slide inprinted),

- needle, and needle position,

- needle nozzle,

- idle jet,

- main jet,

- float valve number

- choke jet,

 

I personal would recommend a NGK BP 5ES too... 

 

I'll check it out this week when I get carb of 

Update and fixed !!! I have fitted a brand new dellorto carb from euro carbs jetted and ready to fit and the bike now starts runs and rides like a new one ! Thank you for all the advise you guys ! 

 

I'll be in touch when it fooks up again which will probably be soon ?

1 hour ago, gasgasrob said:

Update and fixed !!! I have fitted a brand new dellorto carb from euro carbs jetted and ready to fit and the bike now starts runs and rides like a new one ! Thank you for all the advise you guys ! 

 

I'll be in touch when it fooks up again which will probably be soon ?

Good news. Did you buy a petrol or air screw carb ?

Edited February 4, 20206 yr by b40rt

On 2/4/2020 at 6:38 PM, b40rt said:

Good news. Did you buy a petrol or air screw carb ?

Petrol bud worked straight out the box