taotao 250d ATV or Vbike 250-V4D
I'm thinking the following should be done to the V4D / 250D when you first get it.
but have a few questions? Any help is greatly appreciated.

1. Use premium gas
(mid premium gas about 89 octane)

2. Change out the spark plug to a (NGK) NGK D8EA (cost: $4)
recommended gap? .028-.030
most of the bikes are coming with this plug already.
? is their another brand that is better and what model number?

3. Change the oil and use a synthetic oil (cost: $8)
after a couple of regular oil changes and the break in period.
AMSOIL Synthetic ATV Oil, Formula 4-Stroke® Power Sports Synthetic Motor Oil
use an oil specific for ATVs (use no additives with regular oil)


4. locktight all nuts (cost $15)
blue loctite and maybe locktight washers
are their any problems doing this? should I use a torque wrench on the nuts and if so at what torque?

5. New Chain (428H KMC with 3/4 inch max play)(cost: $15)
best chain would be RK Gold Pro 428 ($38)
? I noticed the max C.C. is 150 for the KMC Chain. Since this will be a 250 CC , anyone know if a 118 or 120 link is needed?

6. Change the front sprocket to a 13 or 14 tooth (13 tooth front JTF259 sprocket) (cost: $10)
I think I am leaning to a 14 tooth
a. should you also change out the rear sproket at the same time to ensure a quality sprocket? or is this not needed? Is this a simple replacement?
would it help reduce chance of chain comming off?
b. if the bolts touch the chain with the 13 tooth, doesn't this cause problems later on? should I go with a 14 tooth instead or is the 14 tooth too little of a change from the current 15 tooth that comes with the ATV.
c. also is an after market chain tensioner recommended and if so what brandand model.

7. Any other suggestions I missed?
Do I need a back up battery (if so what brand and model)
When I need to replace the tires will any 8" brand tire work?
anyone know of a good swing arm bushing that will fit?
I think this is the bushing from roketa.? atv-17w-150-04-08 this is for the 14mm bolt size? anyone know of a good bushing for this?

should I get a set of nuts to keep on hand incase I loose one out on the trail?

I know this sounds like a little bit of work but I'm hopeing to to be able to do about $100 in upgrades and have a pretty good reliable ATV.

Thanks