Question about 1987 Suzuki GSX-R 750 H

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Recent problem i currently own the 1995 model with a yosh pipe, k&n air and oil filters,with new dunlop 208 tires I really love the bike.But i do have a recent problem .While riding the bike started to lose power and sounding like a 2 stroke motor and hard to keep it idiling now,Can someone help me diagnose this problem

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I have just accquired the same bike in showroom condition (less than 150km) Since it has been kept in a display showroom for 9 years, the lubricants and some parts are expired ( although they still look brand new) . I´ll be ordering replacement parts, apart from getting new tires, I have decided to up grade the air & oil filters to K&N,put in a Yoshimura RS3 Can for that extra touch . You saying I should go for O.E. and not risk engine recalibration? I do know that the Carbs on these bikes are tricky... Can you advise me on your tire size too? I´m thinking of going 1 size wider in the front 130/65. Or is the original size good enuf.

Posted on Nov 10, 2008


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Oil is transfering up to the pipe that goes to the intake of the carb. 1985 Harley 1340cc

The pipe you are talking about is the crankcase vent pipe. EPA regulations required that the air vented from the crankcase be run through the carburetor and burned in the engine. If it's a lot of oil and your bike has been sitting for a while, this is common and is referred to as "oil sumping". The reason for this is that when the bike is left sitting for long periods of time, oil will seep past the check ball in the oil pump and build up in the engine case. This is because the oil tank is located higher on the frame than the engine. When the engine is started, the scavenge gears in the oil pump cannot pump the oil back into the tank fast enough and it is blown out of the crankcase vent. If it's just a small amount of oil that accumulates over time, this is also common. Although the pipe has baffles in it, some oil mist still gets into the air filter. Most riders get tired of replacing or cleaning the air filter and simply disconnect the hose down at the crankcase and replace it with a piece of hose run straight back under the engine with a filter on the end of it. Plug the hole in the backside of the air filter.

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Handling seems alittle loose

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2 Answers

Stratoliner always tracked perfectly straight now veers slightly to left when I take my hands off handle bar it dosn't seem likely that it is a alienment problem only 4000 miles

Did you change anything ... like putting stuff in a saddle bag? Different boots? Have you cheked air pressure in the tires? Are you sitting on the bike differently?

I'm leaning to tire pressure or uneven front tire wear and it does not have to be a lot of uneven tire wear to act in thismanner.

Please my friend, get this looked at by your Yamaha professional

Thanks for posting at

please vote


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1 Answer

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1 Answer

Accelerate tire

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