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I like to ride in wooded and grassy areas. It takes my mind off the everyday routines and helps me deal with my father's cancer. Also gives me a reason to get involved with forums like this one.

Hi all - I recently had a shop fix this quad and it hasn't been right since. The jug was resealed as it was leaking, the rings were replaced, and the valve stem seals replaced. Shop said the cylinder walls were great so nothing was done there. The motor still smokes, heavily on startup and all but quits once warmed up. Enough that I can live with it if I can fix what I came to ask about. I mentioned this work because since I've gotten it back it seems like it has power but tops out at a much slower speed than before. It's old so I don't have a speedo but I pulled out my phone at it tops out at 25 mph. I know before the work, I was getting up to 45+ mph... It's so bad, my 10 year old daughter is pulling away and straight leaving me in the dust with her governed Polaris 90.
Given the work done, what are some thing I could be the cause of such a drastic difference? I immediately thought timing but the marks appear to match up with a youtube video I found... no idea if it's correct though. It sat in another shop for 2 months and they gave me an $800 quote just for the starter... it pull starts fine. 
FYI: I would take it back to the original shop to figure out but I had some issues that make them a no-go for me. 

new to the forum saying Hello from arizonA

im new to the forum where are good places to ride in az??

Hello.
I'm new to the forum, I live in the UK. I have just bought a 1995 Yamaha Moto 4 350.
Generally the condition isn't too bad (I paid very little for it!), it looks quite original and all the plastics are quite good. The bad bits are no brakes, the rear axle bearings are shot and the transmission won't shift through the gears properly.
I'm not planning on a full rebuild but I would like to sort it out a bit. The transmission is my main concern. If anyone has any ideas on what might be the cause I would be grateful. I can explain what's happening in more detail if required.
Thanks everyone,
Kester