5wt oil. Use Honda oil.
Use the weight specified in your owner's manual.
Honda reconmends HP thans Oil SAE 80W/85W
Use a 15-40 W engine oil that is JASO MA or MA2 approved, or equally any SF or SG graded oil that is of similar thickness. For a very worn engine you can use a 40 W single grade oil of the afrementioed specifications.
It is important to use the proper engine oil in a Honda TRX 450 ATV. The manual recommends that top grade synthetic 15w - 30w oil such as Motorex Top Speed 4T Synthetic .
I was told to use a 32 to 1 mix by a bike mechanic
The manual say 20w40 but I use 10w40 normal motor oil with any trouble.
dont really matter. amsoil is good
Just buy it from your local Honda dealer.
Polaris has their own special "fork oil". 7.5 weight is equivalent to polaris oil or use a 10 weight to improve dampening.
What oil weight does a 2001 yamaha raptor 660r use
hd 30 weight oil of your choice.