Question about 1998 Suzuki VZ 800 Marauder

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Runs on back cylinder but front cylinder pops a little when idlin

My friend has a 1998 susuki marauder, hard to start, so I put new plugs, and cleaned both carbs. and new fuel lines,it has great fire to both plugs, and now it runs on the back cylinder fine but the front cylinder pops and does not run, I took the fuel line off and very little gas came out, could it be that the fuel pump has lost some pressure, I have no tester, some one said that it my be a leak in the exhaust pipe but I don't see no smoke coming out anywhere but the end of the pipe.
Do you some advice? Thanks!!!

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This particular model uses a BS36ss carb for the # 1carb or back as you are calling it. there is an input and output as a pass through to the second carb intergrated into the fuel delivery system of the # 1 carb. the # 1 carb draws fuel from this port also. check for obstructions at this point where the 2 carbs intersect and in the transfer line to the front carb remember this is a neg. pressure regulated fuel system so any leaks at carb 2 (Front Carb) or Balance Tubes Between cylinders and it wont function . vacuum is the key

Posted on May 27, 2010

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Check fuel filter and air intake and fuel tank vents

Posted on Jul 28, 2009

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Your #1 cylinder ( the front cylinder) is not firing. It could be that the spark plug is fouled or improperly gapped, or the carburetor is not delivering gas to the cylinder. pull both spark plugs Clean the plugs and gap them. The gap should be about 0.035 In. (thirty five thousandths). Reconnect the wires to the spark plugs. Lay the spark plugs against the outside of the cylinders with the metal part of the spark plug body touching the cylinder (creating the ground part of the circuit). push the starter and look for spark at both spark plugs. If you have spark at both plugs, put them back in and start the bike and check the exhaust pipes to see if they are both hot. If one is still cold, the carburetor for that cylinder is not delivering gas. Could be a kinked or clogged fuel line, disconnect the fuel line from that carburetor and see if gasoline flows out. If gas flows out, the carburetor needs to be tuned or removed and cleaned.

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