Hey guys, Recently I've had my belt, rollers and exhaust changed, Belt & rollers are Malossi, the new exhaust: Therefor I think I need to upjet slightly to suit the new exhaust, belt and rollers. My problem been is, I've no idea what the standard size jet is what I am running now, and what different size jet I should try, has anyone any ideas what the standard size jet is? Thanks.
It is a dellorto phvb carb, just no idea of what size the standard jet is, and what one to try next(like a +5 on the standard size or something) Will these fit my carb? http://www.ebay.co.uk/itm/CARB-MAIN...75?pt=UK_Motorcycle_Parts&hash=item258bdf1f23 I read that the standard jet is 82, I was going to try a 90, thoughts?
hi Your new exhaust is nothing special. I would take it for a gentle 3/4 throttle run and then have a look at the spark plug colour. If it's grey, then upjet.
if he takes it on a 3/4 throttle run, it wont even be USING THE MAINJET!!!!!!! some people. dont just guess!! take the jet out/look in a manual for stock jetting? pipes stock replacment, wont need an upjet.. even if it does it will be 2 sizes up at most.
Minor you done any research on me? Coz if you had, you'd know I don't guess. If I don't know I shut up. I advised a gentle run because full throttle is not a good idea until you know where you are going. and 3/4 throttle is enough to give you colour on the plug without breaking anything. At 3/4 throttle you're out of the slow circuit zone and into the needle zone- true. But the needle zone is influenced by the size of the main jet as well - especially if it's the wrong size, unless your needle is way up high with a low clip position. Saying you're 'not using the main jet' at 3/4 throttle is like saying that the slow circuit/needle/main jet are completely separate entities and have no interaction at all. Which, as you know (I have done a little research on you) - is not true. Obviously if the colour is ok, and not grey, a full blast plug chop is the next step. Peace.
