Question about 2000 Suzuki GSX-R 750
I have a 97 gsxr 750 it sat for 2years and recently bought it of my brother. i put new tank and fuel pump and went to start today it doesnt want to stay idileing and at a little throttle it shoots flames and back fires
If your bike is fuel injection model then service the injectors and if carb model service the carbs. It's backfiring because it's running lean . I'm surprised that it started at all after standing for 2 years.
Posted on Mar 14, 2015
If the bike was running correctly when it was put in storage two years ago, I would start with the easy things first: As the previous poster suggested, install new, correctly gapped plugs, along with a new battery. Your bike uses an electronic ignition system, and it will not opporate correctly if you have a bad battery. The bike will miss, pop, and backfire, because there is not enough electrical power in storage (battery) to properly run the ignition system.
If these two things do not get the bike running correctly you will need to look at the carbs. Was the bike stored with fuel in the tank and carbs? If so, this is the most likely reason for the bike not wanting to run correctly. Flames from the exhaust are an indication of a very rich fuel/air mixture (a float could be stuck open (it can also be caused by the ignition not working properly and allowing unburnt fuel into the exhaust system)). Cleaning and reassembling mulitple carborators is not that difficult if you are careful and reasonably handy, but tuning them properly can be very difficult. You can save a lot of money if you rebuild them yourself, then take the bike to the shop to be tuned (The standard service rate these days is around $75 an hour)
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Posted on Jan 02, 2017
best way to do this is to take spark plugs out individually and check for smell and sight of fuel. if it is getting fuel but not sparking then you will have a wet sparkplug. if it is dry look at the colour of the hook at the bottom of the plugs. brown plugs means running too rich, grey plugs means average burning and working well. black plugs is very bad and must be serviced. if all this not working the other test you can try but dont spill any petrol before you do this. if while you have plug out(only one at a tim or yuoll loose where wot leasd went to where) plugging it into the cable and holding with a very insulated pair of pliers, then try to turn bike over(start) whilst looking at the hook bit on the plug. if you see a bright spark from the plug then you will prob find they firing in the worng order. this could be a problem and should be dealt with by a dealer.
Posted on Feb 26, 2009
Clean the air filter and, if you have one, remove the water trap bowl on the fuel petcock and clean it. How good is the battery? Install new STOCK plugs. Bear in mind it may be time for carb kits. Other than your cleaning the carbs, the carb kits and balancing and synchronizing of the carbs are best left for the shop to do.
Check the exhaust pipes. If there is a restriction in the burned gases exiting the tailpipe then the bike will not run right, will loose power and even die if too much back pressure builds up. Disconnect the exhaust system and tick off the neighbors with a quick ride around the block without a muffler. If the engine still dies then exhaust is not likely to be the problem.
Check the compression on all cylinders. Depending on the compression, the bike may be ready for a valve job. If you pull the head for the valve job then you might as well consider re-boring the cylinders and install new pistons and rings. Bear in mind, doing a valve job and / or pistons is not recommended for the novice. The good part is that when the work is finished you will effectively have a new engine.
Please rate this solution as "FixYa" if I have answered your questions. Thanks!
Posted on Mar 25, 2009
Go to http://www.carlsalter.com/motorcycle-manuals.asp , and download a (free) manual. Your year is not specified but '93-'95 and '00-'02 are available and should give you a good guide.
Posted on Dec 30, 2009
run a can of Seaforam in the tank..purchase from Autozone put in 1/3 to two gallons gas drive it around for at least 10 miles to insure it cleans out the whole carb system.if that doesnt work, check all carb hose fittings when bike is at idle spray some Chemtool B-12 ( also at Autozone) around the carb hoses and manifolds..if idle increses thats your problem. Caution: chemtool is very toxic wear gloves and a mask.
Posted on Apr 07, 2010
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