inlets

for those of you with 2001 to 2003 bikes that are anything but a 400 (and some 501s but not all) you have 37mm inlets and they tulip badly. the present RRP on these in the UK is £92 EACH including VAT. i now have a supply of lightweight alloy steel race valves that have a waisted stem...

jeepers creepers! if you ever want an excuse for DVSKs then just take a look at the latest price hike for the good old 37mm inlet! it was £40 just over a year ago and then went to £66 in the spring and now it has just gone to £92. that's $300 australian rubels and 900 american...

a careful look at an inlet valve from the side and up close to the seat face should show you that nice 45d angle. but the widest part of the diameter of a valve should be almost 1mm wide with a slight radius to it. but there it should be all the same - a thick edge which then rolls around into...