Hi.My brother got a leak on a coolant hose (See picture)We have replaced the hose and now it is working fine.My question is: What does the coolant do on the carbs?Bye the way, the inlet rubbers on the carbs dont look good, is replacement needed?
Hi, my very 1st post here in this forum.basically its meant for winter conditions.if u dun experience that, u can do a by pass n block that outlet altogether hence allowing cooler air for combustion. which make the engine slightly more responsive.
Quote from: rajoana on 09 May 2015, 12:19:10 amHi, my very 1st post here in this forum.basically its meant for winter conditions.if u dun experience that, u can do a by pass n block that outlet altogether hence allowing cooler air for combustion. which make the engine slightly more responsive.Welcome rajoana, Interesting first post!What do you class as winter conditions? Where would you block the pipe off?
Well i never experienced winter myself before. I m from Singapore its tropical climate hot and humid all year around.
if your ambient temp is above 20 celsius at least.
below 10 deg Celsius might need this coolant hose to warm the air for combustion.
probably i would need to take some pics to illustrate the rest.
Quote from: rajoana on 09 May 2015, 12:42:25 amWell i never experienced winter myself before. I m from Singapore its tropical climate hot and humid all year around.Lucky you Quote from: rajoana on 09 May 2015, 12:42:25 amif your ambient temp is above 20 celsius at least.i wish my country was cooler
Mine also suffered from the carb icing misfire and the Silkolene fuel treatment also had no effect. Got used to it ( only a problem when starting from cold in sub zero conditions, no problem once bike was garaged) and knew once misfire started just had to stop engine for a minute or so and problem gone till next cold start.When o-rings on coolant pipes exiting the back of the cylinder head started leaking had to take carbs of to replace the o-rings and found the carb heater pipe blocked. Managed to blow them clear with a footpump without dismatling them. Once everything was back together again the carb icing misfire was gone.Checking the way the pipes connected the carb heater only has coolant flowing through when the thermostat is closed. This avoids the carbs being heated to 80 or 90 degrees once engine warmed up
My poor explanation trying to cut down length of post. Carb icing would start to affect low speed running about half a mile after starting in sub zero or very close to zero conditions. It would slowly get worse for the next mile or two until it got to the point when the bike would cut out whenever the revs fell below 4 to 5 thousand rpm. Great fun trying to drive on icy roads in first gear with 6k revs and every boy racer trying to race you because your sitting at the lights revving the engine. That's when you find out if you turn engine off when you pull up at lights when you start it again the problem has gone. Cleared out the carb heater tubes and problem never once reoccurred. If you got an explanation that doesn't involve pilot jet icing I'd like to hear it.