YPVS Front Sprocket

[looey]

Hi,

Does anyone know if there's a problem running an 18 tooth front sprocket on a 1WT YPVS engine ?.

JT only list up to 17 to fit the YPVS engine (even though they make an 18 in the correct fitment), which suggests there's a fitment problem. ?

I'm running a std 17 at the moment and it does look like the chain runs pretty close to the nylon bush over the gear change shaft and running a larger front sprocket would take it closer ?.

Ta

[twostroker]

my f2 had a 18 tooth front sprocket when i brought it and it felt a bit sluggish on acceleration so i swapped it for a 17 tooth and it revs out in every gear and still does just over 120 mph so seems perfect to me.
personly id stick to the 17 but i know i didnt have any clearance issues with either on my standard f2. hope this helps.

[marddy]

Keep it at 17 mate. At 18??...I think it will be very sluggish and may strain your clutch.

[looey]

Yeah cheers, it's not a gearing issue, just wanted to check it would fit ok.

Thanks again

[rich]

Yeah the 18t was an option on the F2 when new. I ran 18/41 on my LC2 and it was nice and had the added advantage of raising the chain run away from the Metmachex arm

[Norbo]

I have 18 front sprockets but i dont sell a lot of them most people do 17 or go down 1 to 16