Robstwin350 Posted November 30, 2004 Report Posted November 30, 2004 (edited) I had problems with my bike not fireing on the left side rebuilt it twice after blowing two sparkplugs same problem both times. now i have new cylinders and head, milded of corse also boutnew carbs 35mm pwk's finshed puting it together two days ago finaly started it today and just my luck same problem just not as bad. PLEASE someone point me in the right direction. My bike has a hill port stock bore 64mm weisco, pwk's35mm, v-force reeds, t-5 pipes, milled head, hot rod crank from the cases up is one week old AM I WASTEING MONEY??? Edited November 30, 2004 by Robstwin350 Quote
dynabanshee Posted November 30, 2004 Report Posted November 30, 2004 What do you mean blew your sparkplugs? You mean fouled? If you are fouling plugs it is likely your jetting and you need to stop taking apart your motor. If your carbs are in sync and you're lean, you may have an air leak. If your carbs are dialed in, is it blowing different kind of smoke out that side? If so, maybe burning copious amounts of oil or coolant. Quote
Leadfoot350 Posted November 30, 2004 Report Posted November 30, 2004 switch plug wires and see what happens. Quote
SDD Posted November 30, 2004 Report Posted November 30, 2004 What is your compression ratio and what kind of gas are you using? Quote
Robstwin350 Posted November 30, 2004 Author Report Posted November 30, 2004 when i say i blew a plug i mean the plug melted once and the second time it just blew up, but did not blow a hole though my piston just damaged it and the cyilinder real bad. at the time of all of this i was running 66.5mm pistons and 17cc domes. Also i am running vp110 fuel as instructed by many builders because of compression, but i do not know what copression im running Quote
SDD Posted November 30, 2004 Report Posted November 30, 2004 when i say i blew a plug i mean the plug melted once and the second time it just blew up, but did not blow a hole though my piston just damaged it and the cyilinder real bad. at the time of all of this i was running 66.5mm pistons and 17cc domes.Also i am running vp110 fuel as instructed by many builders because of compression, but i do not know what copression im running 286832[/snapback] With a bigger bore like what you had you can't run 17cc domes. Your compression was probably too much for 110 octane even with stock timing. If your timing was advanced it sure didn't help anything. What do you have now as far as cylinders and head? Is your timing advanced at all? Quote
00Wickedbanshee Posted November 30, 2004 Report Posted November 30, 2004 damn that sucks. i have sort of the same problem i just got my engine finished 1st start im getting all excited, went to start it up doing the break in process its running great for about 3 minutes all of a sudden it starts bogging looked at the pipe smoke in the back theres nothing coming out of the left pipe so we shut the bike off take the plug out to check the comperession we see metal on top of the piston looks like pieces of a ring there was zero compression so we take the exhaust off look in and the piston and cylinder are f up! im so pissed right now so we took it back to the shop so they can see what the hell happened (just got the motor back) a couple months ago. i can fix myself but they should still be responable (i hope) we never took the top and apart Quote
bansheefreestyler Posted November 30, 2004 Report Posted November 30, 2004 each time you start it let it warm up for a long time. this happened to my shee too. and if both sides fire and you start ridiing and then one quits again just stop and let it sit at idle for a good 20 min Quote
thebloker Posted December 1, 2004 Report Posted December 1, 2004 I just got done dealing with a similar problem that my bike had always had since the day I picked it up. It seemed to get worse, and then better, and then worse again. I tried everything, switching the CDI, carbs, coil, plugs, plug wires, intake boots, and so on and so forth. What ended up happening is that the pickup coil was off by 20 thousands or so. I would have never thought that was the problem because it only happened on the left hand side; and I thought that if the pickup was off it would happen top both sides, but that was the deal. Before you try pulling all of your hair out and selling the quad, go ahead and check the gap. I believe offhand that it should be 20 thousands or so, about the thickness of a matchbook cover. Quote
Robstwin350 Posted December 1, 2004 Author Report Posted December 1, 2004 SDD, Now i have new cylinders ,head, carbs,stock bore, milledhead, 35mm pwk's with a moderate hill port or dune port call it what you will. My timing is advanced 5 degrees everthing is less than ten days old. Do you think its a CDI or timing problem i can't think of anything else because everything is new. I checked all of my bolts and gaskets for leeks twice over this baby is air tight, left side just wont fire as well as the right Quote
FIRST BANSHEE Posted December 1, 2004 Report Posted December 1, 2004 damn that sucks. i have sort of the same problem i just got my engine finished 1st start im getting all excited, went to start it up doing the break in process its running great for about 3 minutes all of a sudden it starts bogging looked at the pipe smoke in the back theres nothing coming out of the left pipe so we shut the bike off take the plug out to check the comperession we see metal on top of the piston looks like pieces of a ring there was zero compression so we take the exhaust off look in and the piston and cylinder are f up! im so pissed right now so we took it back to the shop so they can see what the hell happened (just got the motor back) a couple months ago. i can fix myself but they should still be responable (i hope) we never took the top and apart 286964[/snapback] 30 /30 warrenty, 30 feet or 30 seconds. that sucks dude. Quote
FIRST BANSHEE Posted December 1, 2004 Report Posted December 1, 2004 I had problems with my bike not fireing on the left side rebuilt it twice after blowing two sparkplugs same problem both times. now i have new cylinders and head, milded of corse also boutnew carbs 35mm pwk's finshed puting it together two days ago finaly started it today and just my luck same problem just not as bad. PLEASE someone point me in the right direction.My bike has a hill port stock bore 64mm weisco, pwk's35mm, v-force reeds, t-5 pipes, milled head, hot rod crank from the cases up is one week old AM I WASTEING MONEY??? 286720[/snapback] sounds like a crank seal on the flywheel side. might be why your motor keeps melting down. Quote
SDD Posted December 1, 2004 Report Posted December 1, 2004 SDD,Now i have new cylinders ,head, carbs,stock bore, milledhead, 35mm pwk's with a moderate hill port or dune port call it what you will. My timing is advanced 5 degrees everthing is less than ten days old. Do you think its a CDI or timing problem i can't think of anything else because everything is new. I checked all of my bolts and gaskets for leeks twice over this baby is air tight, left side just wont fire as well as the right 287163[/snapback] If your CDI was bad it wouldn't run. If the coil or a spark plug cap is coming loose if you swap the plug wires from one plug to the other and the other side has the problem check the caps and wires to the coil. I never advance my timing right off the bat. Break in the motor first then start dialing everything in to get the most out of what you have. Who milled the head? Did they recut the squish band? Start by checking the air screws and make sure the slides are coming up at the same time. If this doesn't help try swapping carbs from one side to the other. If the right side starts having the problem make sure the pilot jet isn't plugged up. If it doesn't help pull the reed cage on the left side and make sure the reeds seal properly and check the intake for cracks. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.