SOHC.co.uk Forums > CB750
re-jetting needed?
El__burro:
Still running like sh*t.
when I rev it sounds great. The problem is the second part off the throttle, it feels like it is electrical. 2 of 4 plugs are quite carbon fooled. Needle is back on the last position so it lets in more fuel. What are the best spark plug I can fit with the resistor caps?
Thanks
el__burro
Johnwebley:
--- Quote from: El__burro on August 02, 2017, 12:11:56 AM ---Still running like sh*t.
when I rev it sounds great. The problem is the second part off the throttle, it feels like it is electrical. 2 of 4 plugs are quite carbon fooled. Needle is back on the last position so it lets in more fuel. What are the best spark plug I can fit with the resistor caps?
Thanks
el__burro
--- End quote ---
which 2 plugs are fouled? are they a linked pair? IE; 1-4 or 2-3 ,
both those pairs use common coils,points etc.if the other plugs are cleaner,and on the same carb settings,you could have ignition
issues ,
secondly ,if the needle has its clip at he lower groove,it lets in more petrol,so will run richer ,from maybe 1/3 to 2/3 throttle ,
but all 4 carbs should be set the same,and all 4 plugs should be about the same colour ,
Greebo:
--- Quote from: El__burro on August 02, 2017, 12:11:56 AM ---Still running like sh*t.
when I rev it sounds great. The problem is the second part off the throttle, it feels like it is electrical. 2 of 4 plugs are quite carbon fooled. Needle is back on the last position so it lets in more fuel. What are the best spark plug I can fit with the resistor caps?
Thanks
el__burro
--- End quote ---
You have tried many suggestions now so I think its time to get it booked in for a Dyno before it drives you potty.
I cant see it being the plugs or resistors unless they are old & shot. plugs I use are NGK DR8ES-L... Resistor caps Part Number 30700-GAR-000 30700-MW3-000
El__burro:
What's the cost for a dynodyno test and where in london.
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Greebo:
--- Quote from: El__burro on August 02, 2017, 04:48:37 PM ---What's the cost for a dynodyno test and where in london.
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--- End quote ---
Sorry Mate no idea "of where in London" I'm in Yorkshire.
The cost depends on what needs doing but just a Dyno Run to find the issues is about £45 ish + parts + extra time etc.
do a search on google for your area
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