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Originally posted by GauravAnekar
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This fortnine video just strengthens my belief in my own running in and oil change method, this video is interesting. Please see:
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True that. Fort Nine is the one of the best motorcycle youtuber out there. And to think Suzuki is only slightly better than Harley Davidson and way behind the German and other Japanese pack. Good lord. This Japanese says : we go the American routeOriginally posted by GauravAnekar View Post
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Another update : Got Highway mileage over 45 kmpl. (speed between 60 - 74 kmph in 6th gear that is below 5k rpm. Kept the speed low all the time as a friend was riding a 125cc Honda SP). The difference not shifting gears for kilometers at a stretch makes.Comment
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Based on the advice of fellow xbhpian Undercoverzafar, I used gear oil to lubricate my chain. A short video of the same.
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Got the same efficiency, now the ODO reads 3.3k somethingOriginally posted by GauravAnekar View PostComment
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Hi all,
i did booked a gixxer SF250 to upgrade from avenger 220, my expectations are refinement and reliability, 220 is reliable but lacks the refinement and 6th gear.
now i have second thoughts after hearing that gixxers have oil leaks through magneto cover gasket and head case rubber. do anyone of you experienced this, did the company fixed that issue.if no, is it serious or be able to solve by a DIY.
thanks in advance.Comment
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my Gixxer is oct/dec 2020 manufactured I think, have ridden 3800km, no issues yetOriginally posted by cruiserboy View Post
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How to check the manufacturing date in SF250, where are the chassis no and engine number punched.
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Any easily openable under the seat storage is provided to keep documents in SF 250.Comment
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Hello friends , how to check the manufacturing date of this bike.
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Hello friends,
How I could Know, the bike was used as for demo/ test rides.Comment
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Thanks for that post. Did anyone get a recall notice or call from their service centers?Originally posted by cruiserboy View PostComment
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Thank you for the informative article sivaOriginally posted by siva23Guys,interesting Japanese links explaining the engine developement in detail....translate it.
https://motor-fan.jp/article/10014133
https://carview.yahoo.co.jp/news/det...71335fc662161/
Suzuki have their own character,R&D,customer centric,long term reliable and afford-ability, with all these they had developed an masterpiece gem of an engine.
we are always admire about Rx100 but forget suzuki shogun, and praise Cbr 250r for its 27 technology (https://www.rideapart.com/news/25684...250r-possible/) & hooligan dukes with all high mainteance and lots of issues.......
But for a budget oriented ,wider range of audiences who wants to taste the speed,thrill,balanced sweet lightweight handling,burden free maintenance,simplicity all comes in package.......definitely an underrated product , though there are 1000's of pages in other fz25/duke/r15 threads all discussing issues...here there are less issues yet to discuss apart from praise !!
Translated from above link :
The engine installed in the Gixxer SF250 and Gixxer 250 is the newly developed oil-cooled SEP engine "EJA1".
By adopting an oil cooling system, a compact cylinder head, a lightweight piston, etc., it has high power and low fuel consumption. A lightweight engine with a small number of parts.
The thick torque in the low to medium speed range, which is well-established in the Gixxer 150, is carefully inherited in the 250cc version of the older brother, and the engine is finished with an output that allows you to enjoy the fun of driving.
SEP, which is a general term for the Gixxer SF250 and Gixxer 250 engines, is an abbreviation for "SEP (SUZUKI ECO PERFORMANCE)". By increasing combustion efficiency and reducing friction loss, fuel efficiency is achieved without reducing power. In other words, it is a "good point" engine that delivers high output while maintaining low fuel consumption.
The development concept of the engine of the Gixxer SF250 and Gixxer 250 called "EJA1" is:
・ High output
・ Small and light
・ Compliant with environmental regulations (Euro 5)
・ Excellent durability
・ Excellent operability
4 to realize the above The two keys are
1: new oil cooling system "SOCS"
2: small head block
3: communication hole
4: piston
"SOCS" is an abbreviation for Suzuki Oil Cooling System.
Why did Suzuki focus on oil cooling again?
In developing the Gixxer SF250 and Gixxer 250, Suzuki focused on the point that "unless it is an ultra-high power engine such as a liter motorcycle that generates a huge amount of heat, it is not necessary to have cooling efficiency as high as water cooling." ..
"If it is the concept of the
Gixxer, it can be oil-cooled, isn't it?" This idea triggered the adoption of a lightweight oil-cooled engine for the Gixxer SF250 and Gixxer 250.
What are the basics of cooling an engine?
Increase the flow velocity of the
medium (air for air cooling, water for water cooling) ・ Lower the temperature of the medium (air for air cooling, water for water cooling)
Oil The cold engine is developed according to this principle.
A conventional oil-cooled engine is a system that cools the engine by spraying cooled oil like a shower from above the combustion chamber. As a result, we succeeded in cooling "the part of the engine that has the most heat", which could not be cooled by air cooling.
Newly adopted "oil jacket", an oil passage that surrounds the combustion chamber
Specifically, an "oil jacket", which is connected to a single human intestine and has a certain cross-sectional area, is placed so as to surround the combustion chamber.
By flowing oil through this narrow passage, even a small amount of oil can be maintained at a high flow velocity as a whole. It has become possible to effectively remove heat and cool the entire passage.
Diverting the law of "hot bath" !? Installed a protrusion "BLB (* Note)" to intentionally disturb the flow of oil
In the case of oil, the heat "boundary layer" is thick because it is muddy compared to water. In other words, it is more difficult to transfer heat than water. This makes it important to actively destroy the thermal "boundary layer".
By adopting "BLB (Boundary Layer Breaker)", it is possible to efficiently remove heat from the engine = cool the engine.
* Note: Suzuki has obtained a patent for "BLB (Boundary Layer Breaker)".
Newly adopted "Cooper Grip" to assist heat transfer from inside the cylinder
By providing two oil paths, one for cooling and the other for lubrication, the oil cooled by the oil cooler is directly applied to the cooling of the combustion chamber.
The new oil-cooled engine uses a "Cooper Grip" to assist heat transfer from inside the cylinder. "Cooper grip" is a steel sleeve (a round cylinder with a piston that moves up and down) with an uneven shape on the outer peripheral surface. This improves the adhesion with the aluminum cylinder. In addition, the uneven shape increases the surface area and improves heat transfer.
Safe on the traffic jams in midsummer! Installed an electric fan in a large oil cooler
The new engines of the Gixxer SF250 and Gixxer 250 have no engine fins used in the conventional oil-cooled "SACS (Suzuki Advanced Cooling System)", but there is no problem with cooling. On the contrary, by eliminating the fins, we have realized low cost and light weight by reducing the amount of aluminum material.
Engine oil is characterized by its high viscosity (muddy) when it is cold, and its viscosity decreases (smooth) when the temperature rises. Taking advantage of its characteristics, the oil-cooled type has excellent warm-up performance when the engine is cold = oil is muddy = heat is difficult to transfer = cold air, and a clean engine can be obtained.
The "just right temperature" in the middle of air cooling and water cooling contributes to low fuel consumption performance and high durability.
The point is that the "EX valve seat" has achieved a significant improvement from the air-cooled type. This temperature was successfully suppressed to within Suzuki's target temperature in order to ensure the durability of the engine.
In this way, there is an ideal temperature zone in the "upper part of the cylinder". The newly developed oil-cooled type succeeded in keeping it in the middle of air cooling and water cooling. This "just right temperature" also contributes to low fuel consumption and high durability.
Uses a compact SOHC (overhead camshaft) with a single camshaft
In addition, in order to improve intake and exhaust efficiency, we have introduced 4 valves equipped with 2 intake valves and 2 exhaust valves. The know-how cultivated in the race is condensed, such as incorporating the "roller type rocker arm" that enables low friction.
"Communication holes" are installed on the sleeves of the cylinder skirt.
The "communication hole" realizes the diffusion of waves due to the reciprocating motion of the piston. Normally, when the piston descends, it pushes the air → It pushes down the oil in the oil pan, but by providing a "communication hole", the air diffuses in the left and right directions. This lowers the oil level → prevents the piston from sucking air. This also contributes to the compactness of the engine.
The engine is as compact as the "Gixer 150"
By the way, this is also due to the fact that the "BGA1" engine is vertically long because it is a long stroke type that emphasizes torque.
"Synergy Circle Texture Coating" is adopted for the piston for the first time on motorcycles
Optimized for sports bikes that regularly use the high rev range when adopted for the Gixxer SF250 and Gixxer 250. A unique texture-shape is set by combining two types of circles. The point is that the layout takes into consideration the clearance between the piston and cylinder when the engine starts.
By adopting "Synergy Circle Texture Coating", the thickness of the oil film at high speed is optimized to reduce excessive drag caused by engine oil and realize output characteristics suitable for sports bikes.
In addition, while casting the piston, the outside of the sidewall is lightened to reduce weight. The response has been improved and the vibration has been reduced.Comment
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