SV650.org - SV650 & Gladius 650 Forum - View Single Post - Throttle cuts out randomly at 4-5000rpm

Craig380 · 17-03-25, 02:09 PM

Hi and welcome to the org.

Have you got an 'FI' warning in the dash? If so, you'll have a fault code / codes that could help diagnose the problem.

If you don't have an FI warning or check engine light, I would start by giving the bike a full check over. Check all 4 spark plugs are snug and not loose (new plugs can and do loosen themselves). Make sure all the spark plug caps are fitted correctly. Lift the fuel tank and check all the linkages for the main and secondary throttle valves, lubricate them with a teflon lube spray. Check for loose connectors, there are loads of them under the tank. Check the vacuum hoses around the throttle bodies for splits / holes. Use a torch to inspect the rubber vacuum caps on the throttle bodies. Are any split / dried out?

Any of the above could cause your symptoms, so take your time and look carefully. Good luck!

17-03-25, 02:09 PM	#2
Craig380 Member Mega Poster Join Date: May 2015 Posts: 1,300	Re: Throttle cuts out randomly at 4-5000rpm Hi and welcome to the org. Have you got an 'FI' warning in the dash? If so, you'll have a fault code / codes that could help diagnose the problem. If you don't have an FI warning or check engine light, I would start by giving the bike a full check over. Check all 4 spark plugs are snug and not loose (new plugs can and do loosen themselves). Make sure all the spark plug caps are fitted correctly. Lift the fuel tank and check all the linkages for the main and secondary throttle valves, lubricate them with a teflon lube spray. Check for loose connectors, there are loads of them under the tank. Check the vacuum hoses around the throttle bodies for splits / holes. Use a torch to inspect the rubber vacuum caps on the throttle bodies. Are any split / dried out? Any of the above could cause your symptoms, so take your time and look carefully. Good luck!