Instruction Manual for MIKUNI VM26 Carburetor Kit
Contents
1. yy Instruction Manual for MIKUNI VM26 Carburetor Kit Item No 0 00 00 000 L Applicable models and Frame Nos 6V DAX50 ST50 1000001 except for 6800022 6346265 6V DAX 70 ST70 1000001 12VDAX AB26 10000014 O Thank you for purchasing one of our TAKEGAWA s products Please strictly follow the following instructions in installing and using the products Before fitting the products please be sure to check the contents of the kit Should you have any questions about the products please kindly contact your dealer Please note that in some cases the illustrations and photos may vary from the actual hardware Please read the following instructions carefully before installation We do not take any responsibility for any accident or damage whatsoever arising from the use of the products not in conformity with the instructions in the manual You are kindly requested not to contact us about the combination of our products with other manufacturers In installing this kit you need an optional racing throttle set and a front brake lever This carburetor kit is for exclusive use with our bore up kit and is not applicable to a stock engine A standard air cleaner cannot be equipped together with this product The engine will go wrong if the engine gets wet So please refrain from running in the rain Besides before washing your vehicle cover the carburetor with a plastic sheet or the like2. URL http www takegawa co p 2 3 J an 20 10 f How to Set the Carburetor O When the carburetor does not match the engine and the engine fails the engine failures are caused by either too dense or too lean air fuel mixture O The engine failure symptoms for the engine are as follows When the air fuel mixture is too dense When the air fuel mixture is too lean O The explosion sound with a dull thud continues intermittently The engine overheats somewhat O The engine malfunctions further if you use the choke O The engine starts working well If you use the choke O The engine malfunctions when you warm it up O The engine does not accelerate well No smooth acceleration The engine works well if the cleaner is detached O Revolutions change generating weak power The motorcycle belches dense or black exhaust gas O The plug burns white O The plug smolders getting blackened X Set the carburetor only after warming up the engine and then test drive And use a plug with the right heat value x Do the setting in the following manner studying at what throttle opening position the engine starts failing Jet needle Throttle position at 1 4 3 4 Whether or not the engine revolution is in proportion to the throttle operation O When the acceleration is not smooth or even make the air fuel mixture dense O Make the air fuel mixture lean when the engine revolution goes up
3. heavily and belches black gas The mixture ratio at this throttle position can be adjusted by the location of E ring in the grooves The air fuel mixture becomes dense as the location of the E ring moves down from the 1st to the 5th groove 3rd groove 2nd groove 4th groove 1st groove oth groove Main jet The throttle position at 3 4 4 4 The air fuel mixture ratio at this throttle position can be adjusted by changing the number of the main jet The larger the main jet numbers the denser the mixture ratio becomes In view of the engine and muffler specifications select the most appropriate main jet to get the highest revolutions O Pilot jet First of all please adjust the air screw In case you have given more than three turns to the air screw to tighten it use a pilot jet with a small number O If you have tighten the air screw clockwise to the full use a pilot jet with a larger number Check whether you have made a right choice of the pilot jet by seeing if the engine starts up revolving smoothly from the idling to running at slow speed When the engine revolves up unevenly the pilot jet number is too small At idle O When the motorcycle belches black exhaust gas and produces heavy exhaust sound the pilot jet number is too big At idle O After replacing the pilot jet you need to readjust the airscrew O Air screw The air screw adjusts the air mass flow at the time of engine s revolving at slow speed At id
4. buretor by aligning a notch on the O O Insert a fuel tube and fasten it with a tube throttle valve with the throttle stop screw clip Open the fuel cock and ckeck for oil leaks Do not leave the cock open for a prolonged period of time 0 O O Pull the choke lever to start the engine Gradually push the lever back and warm up the engine till the revolution becomes smooth and finally push the lever back to its original location In case after the warm up of the engine your motorcycle does not run idle or the idling engine speed is high adjust the setting with the throttle stop screw O0 O O Do settings in a safe place according to the specification of your vehicle with enough care Pull out the fuel tubes and reconnect them being careful of the oil leak The fuel tube with vartical lines is the one for reserve tank side X If the tubes shows an indication of exhaustion such as wear out and crazings replace them with new ones HOU O O Fit the carburetor into the insulator and fasten the carburetor with a clamp band O0 U Install an optional racing throttle kit x Please refer to the attached manual for details SPECIAL PARTS WN4SeYWYA Co Ltd 3 5 16 Nishikiorihigashi Tondabayashi Osaka Japan TEL 81 721 25 1357 FAX 81 721 24 5059
5. et pipe gasket between the cylinder 0 O With an adjuster adjust the free play at the AN CAUTION Be sure to tighten to the specified head and the inlet pipe and tighten the inlet pipe throttle grip to be approximately 5 mm torque with a torque wrench with SOCKEL Cap SCieWs OF GAN alls A p k Torque 10 N m 1 0 kgf m O O And fix the insulator to the inlet pipe with two socket cap screws Torque 10 N m 1 0 kgf m O 0O Install the fuel cock stay to the fuel cock with an 6x10 socket cap screw midium and a 6mm washer Torque 10 N m 1 0 kgf m Less free play More free play l Insulator Inlet pipe Adjuster _ About 5 mm Insert a collar to the threaded hole in which the air cleaner mounting bolt was fixed and install a fuel cock stay with a 6x15 socket cap screw s and a 6 mm washer s Torque 10 N m 1 0 kgf m Inlet pipe gasket Snap the throttle a few times to make sure that the throttle moves smoothly without sticking and that the throttle valve is fully open Also check that the throttle has free play even when a steering handle is turned all the way to the right or to the left O O Remove the top cover of the carburetor of the kit and pull out the spring and throttle valve Pass the inner cable of the throttle cable through the carburetor top cover and then through the spring And compressing the spring fix the top cover to the throttle valve Fix the throttle valve to the car
6. ir parts be sure to quote the Repair Part Item No Otherwise we may not be able to accept your orders There are some parts however for which we are not in a position to accept your order in just the quantity to be used In this case please take them in the quantity packed Installation Procedures Please check the contents of this kit O O Remove the top cap Preparation N CAUTION Make sure that the engine and the muffler are cold enough Stabilize the vehicle Xx Empty the fuel tank before removing the pet cock O LAfter making sure that the fuel cock is closed open a drain cock on the carburetor and drain Kit Contents ZA Carburetors initial settings 190 22 5 5E75 Clip position 3rd Throttle valve cutaway 1 5 Air screw opening Loosen the screw by one tum Main jet Pilot jet J et needle O O Remove the air cleaner mounting bolt s and nut s and take out the air cleaner case from the frame the gasoline from the float chamber to a tray or something O O Unfasten a pan screw and detach the fuel cock from the carburetor Unscrew the air cleaner mounting bolt s and the inlet pipe mounting bolt s and remove the carburetor with the inlet pipe attached x Be careful not to let any foreign materials fall into the intake port yy J an 20 10 f D Installation 0 O Place an inl
7. ling O Give the air screw a right turn The air fuel mixture gets dense O Give the air screw a left turn gt The air fuel mixture gets lean Loosen the tightened air screw back to the 1 5 turn position And then from this position give to the airscrew a right or left turn of 1 4 to 1 2 till the engine revolves at the highest speed Loosen the idle stop screw till you get the steady idling revolutions And once again adjust the position of the airscrew to get the highest revolutions On how the barometric pressure temperatures and humidity affect the setting At highlands or at high altitudes the barometric pressure and air density go down and the air gets into the carburetor in less amounts This makes the air fuel mixture dense which was adjusted at low altitudes Under the weather conditions with very low temperatures the air density increases which makes the air fuel mixture lean Under the rainy and humid weather conditions the air density decreases which makes the air fuel mixture dense Please be informed that mainly because of improvement in performance design changes and cost increase the product specifications and prices are subject to change without prior notice This manual should be retained for future reference N
8. riding down a road stop riding immediately and park your motorcyle in a safe place to check Otherwise the abnormaility could lead to an accident Always drive the engine in a well ventilated place and do not switch the engine on in an airtight place Otherwise you will suffer from carbon monoxide poisoning Before doing work place the motorcycle on level ground to stablize the position of your motorcycle for safety s sake Otherwise your motorcycle could fall down and injure you while you are working O As gasoline is highly flammable never place it close to fire Make sure that nothing flammable is near the gasoline Since vaporized accumulation of gasoline is at the high risk of explosion work in a well ventilated place Please be informed that mainly because of improvement in performance design changes and cost increase the product specifications and prices are subject to change without prior notice This manual should be retained for future reference al J an 20 10 N my No Parts Nare Qy Repair Part tem No In packs of 03030321 2 meke manoa AB 1 oaeo O a 3 Coturno 1 ooo o o a nsure 1 ooo o S iniet pipe gasket 1j 3 o Fuel cock ASSY ooo j o 7 Fuel cock stay 1 oseo O e Colar esdas 1 onzswro r o Fee 200mm 1 oo omei ooo gt o Hex wrench sm eN NI e e e e w ej ej e x Please note that in ordering repa
9. to prevent water from getting into the carburetor The carburetor of this Kit is shipped at the basic setting Setting should be adjusted according to parts to be used Re set the carburetor to meet your engine Be sure to do the work referring to the right HONDA genuine parts service manual for the above mentioned applicable model The following show the envisioned possibility of injuries and damages to human bodies and property loss as a result of disregarding AN CAUTION ihe following cautions Always use a torque wrench to screw bolts and nuts tight and securely to the specified torque Improper torque could cause these parts to get damaged or fall off O Work only when the engine and the muffler are cool at below 35 degrees C Otherwise you will burn yourself Prepare right tools for the work and do the work in the proper and right way Otherwise improper work could cause breakage of parts or injuries to yourself AN The following show the envisioned possibility of human death or serious injuries to human bodies as a result of disregarding the WARNING following cautions Those who are technically unskilled or inexperienced are required not to do the work Improper installation could lead to a driver s falling down or accidents as a result of parts breakage Q Before riding always check every section for oil leak and slack in parts like screws Besides when you notice something abnormal with your motorcycle while
Download Pdf Manuals
Related Search