Been playing with a intake silencer. Ever since I got the bigger 21mm del on with the little plastic velocity shaped air filter attachment on it..it acted like a mega phone. The bigger carby lets a little more noise out too.. The exhaust is actually very quiet.. All the noise comes out the carby. It is not much just an experimental air box. My learning with this is that any restricted flow is backwards on performance.
I basically have a 12mm gap around the cover to where the box never touches the air filter at all. It now makes a deeper quieter tone. It is growing on me a bit and I will play with this a bit more. Here is my prototype. This little cover cut the noise back in half.
When I first started learning about this motor and the bigger PHBG carb..plus the freaky nasty dirt storms I had in the spring.. I used nylon stockings to cover the foam racing filter and whilst getting familiar I did not want to run the motor lean.. The nylon makes a great filter by itself but put over the foam filter made things coincidentally quiet.
Unfortunately any time air filter restriction is put on a two stroke you sacrifice power. This mod is very quiet and is just over the foam racing filter by it self containing the little sonic booms putting right me at H.T. noise level territory again, if even quieter.. Depends who's H.T. lol..
I used a Organic Vally brand yogurt bottle. Truly the only thing I have nonchalantly come across that is remotely close to the dimensions of the filter embodiment . The plastic from this bottle appears to be fuel resistant too. I also figure I can put a nice reflector on the back of something like this ..
I used a old drywall saw blade the handle was gone. This in turn is very resilient to vibrations and has spring steel to it, it holds memory of where it needs to sit very well. Just need cheap tungsten steel drill bits , a high speed drill. Then right when the drill bit turns cherry red the hole gets drilled through lol. Drill bits don't like spring steel.
On another note got into the clutch today for a look see. I can finally see a little wear it is still working perfect. My guess mebbe another 3000 miles dunno? Will have to report. My thrust washers are doing good behind the bell at the engine wall. I customized those early at the bench grinder and sand paper. Was a slow process when I did it. Took forever..I still have no play that can rattle going on.
Last forgot to say since fall season weather and 80 degree days. My present 21mm jetting and fuel mixture screw have been left absolutely untouched. Got to ride in 8 degree fahrenheit temps at 4:00 am in the morning..
Note to self at 6 foot, a black winter jump suit and a ski mask makes folks at the 7 Eleven very nervous. I took the mask off upon entering lol.
The cold dense air makes the Morini run wicked strong. At stop lights I had to fondle the throttling to keep it from loading up tho. My take on it... the engine was just too cold to digest the fuel. Not complaining at all and it did this even with out the air box in the picture so to speak. In better words there ''is no air restriction''
The air got so dense that on a straight away at full throttle my tiny little bit of 4 stroking safety zone went away. Which was also reserved in my tuning for steep hill climb runs. I am not gonna change my jetting. From what I got to learn and the power its turning out!! It will be fine me thinks.