burned elec smell from exhaust

[JWW]

Guys

I sold the four stroke and got back on a 2. Im pretty weak in the tuning area and wonder if I have a problem.

My son and I were in the desert last weekend. I let him play around on the bike before leaving. When he pulled back up to the truck I could smell what seemed to be electrical burning. After sniffing around I could tell it was coming from the exhaust pipe. Im not sure what jetting is in the bike but it runs really strong and doesnt seem to be overheating. I plan on taking the jetting back stock when I get home but thought I would get some opinions first.

Bike and conditions.

05 RM250
91 Octane
32:1 Formula K2
1 ounce octane boost per gallon (per last owner recommendation)

Last ride (2nd ride on bike)
So Cal desert
100 degrees
ran strong....lots of spooge on the spark arrestor and fender.
doesnt seem to overheat
weird smell

Previous ride
So Cal mountains
80ish degrees
ran strong
no overheat
minimal spooge

No changes were made to the bike between the rides.

 

[snb73]

When riding in the desert you are able to open the bike up more and ride it a bit higher in the rpm range. This increases pipe temperature and can burn off any oil residue left behind from riding the bike a little less spiritedly.

More than likely what you are smelling is that oil residue burning off.