I also get rid of the front mounting studs and go to my local Lowes hardware after measuring the depth needed and taking the studs with me to get the proper thread pitch and replace the studs with hex head steel bolts instead, and blue locktite them in and also use "wavy" style lockwashers with those bolts...its absolutely solid and nothing loosens up on that mount...Just make sure you postion and seat the rear mount first and then attach the front mount, and then do the final tightening on both.
I was getting some black on my clothes as well and thought it was from the muffler tail pipe end...Found out it wasn't...The black was actually coming out of the cheap, crappy, chinese, stock exhaust gasket between the engine and the pipe...I replace that with a gasket from a Toyota land cruiser O-2 sensor...no more dirty clothes.
Here is the current Toyota dealer parts#/stock#, for that gasket...89466-20020-83.
If you shop Autozone, etc., its a "Dorman" brand part number ...Dorman 47021
When installing it...The side that has more metal to it rests against the exhaust pipe, not the engine block/cylinder head area...you will need to slightly elongate the holes in that gasket for the bolts or studs just a wee little bit for a perfect fit...I used a slightly oversized bolt to do that with.
This is the best "exhaust gasket" for the Zeda 80...DAMIEN
Ps...Be sure to talk to me about the positioning of the needle valve "C" clip position BEFORE you put that slide into the carbie...it is critical for proper performance.
And for God's sake, order this direct fit airfilter for that carbie to get really great proper airflow for that carbie...That is the only other modification i recommend for the Zeda 80 motor kit.
Motorized bicycle, motor bike, electric bike, ebike, pedal assist
sickbikeparts.com
After using the Valvoline 2 cycle oil that is recommended in the instruction manual, (Change what they recommend for the mix to a 32:1 ratio instead...Thats 4 ounces oil to one gallon of gasoline, preferably Ethanol-free gas, (Ethanol is known to eat at engine seals on 2 cycle motors and causing eventual leakage), and always mix in a one gallon gas can, never in the tank, as it won't be accurate otherwise), i use this oil thereafter as its the finest ive found and have run it for years...on my old bike, i had 6000 miles over 5 years of trouble free riding, at least as far as the motor was concerned...still have that old motor on a shelf should i ever need it again...lol.
Shop DOMINATOR® Synthetic 2-Stroke Racing Oil at AMSOIL. Find premium synthetic oil, filters and more online. Fast, free shipping available.
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If you don't know where to get Ethanol Free gas...just tell me where you live...i can locate a supply for you.
I also replace the flimsy "bicycle" kick stand with a center stand that is more substantial and sturdy.