- Fri Jan 08, 2021 2:57 am
#94736
My bike is a 2005 Classic. Iron barrel bored to 535 with high compression piston from our host. Recently I bought an open silencer from them. I already had a POD air filter. The recommended jets are 125, P2, 30 and a 2.5 slide. Mr H was out of stock for the P2 so I am running the original but I can't read the numbers on it. (So I have 125, P0, 30 and 2.5) I presume it is P0. With the needle in the richest slot it runs great, any other slot very badly at low throttle. Yesterday I took it for a 95kmph plugchop but it suddenly slowed to a stop after 15 seconds at 95. When it stopped I found it had no (none at all) compression and suspected a holed piston. The plug was burnt white, very very lean. A plug chop at lower speeds had previously showed the plug to be perfect. Strangely after cooling down it got compression as normal, started first go and I rode home slowly, the plug looking good when I got home. I had a 130 main jet which is the highest I have so I put it in, test rode it at less than 75 and all ok. I will not go any faster yet. (bad weather and lockdown) It seems I have done no damage to the engine and the compression feels the same as before and it runs as before. Any hints out there regarding an even higher main jet or maybe I MUST get a P2. (I have neither at present and postage from UK is ridiculous)