This head is heavily modified. I'll fabrikate custom intake for single carb.
I forget to mention that in my current setup fuel consumption is high 5-6l/100km depends I'm on road or offroad.
A friend of mine with 2005 USA version DR650SE have consumption of 3,8-4,2l /100km. We swap our bikes and him ...

What about throttle switch?
How do you think it works? Retarding at full throttle?
I've diconected it and it seems the power drops more.

Hi.
I've grinded off that weld:

To this:

So no restriction there for sure.

I check carburettor and it is all stock without any signs of limiting -no holes in throttle valve, no strange plastic things in diaphragm cover, jetting is by specifications.
With stock gearing in 5th Bike can reach 130km/h and cant rotate up to 6500rpm. With 14/41 it can go up to 135km/h and ...

Hello.
I'm new here and I don't speak German, just can read with Google translator.
I've bought second hand SP46 from Germany, but I'm not sure if it's 34 or 43 PS version.
It can reach just 135 km/h max and engine is in very good condition.
Can you please tell me how to check if it's normal or ...