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techtalk:evo:carb02 [2019/05/06 05:29] ixl2relax [Before Tuning - Collect Your Information] |
techtalk:evo:carb02 [2019/06/14 21:06] ixl2relax [Before Tuning - Collect Your Information] |
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| The "DynoJet" kits (and many equivalent ones) can be an issue. Typically, they replace the factory needle, emulsion tube, main jet & diaphragm/slide spring. They also recommend that you drill the slide vacuum hole out for quicker throttle response. The DynoJet emulsion tube and main jets are not compatible with the Keihin emulsion tube/jets - they use different threads. There are even FAKE Dynojet kits that have shown up on the market, presumably from China ((Fake DJ Kit - https://www.dynojet.com/warnings/PressReleaseKnockOffJetKits.pdf)) | The "DynoJet" kits (and many equivalent ones) can be an issue. Typically, they replace the factory needle, emulsion tube, main jet & diaphragm/slide spring. They also recommend that you drill the slide vacuum hole out for quicker throttle response. The DynoJet emulsion tube and main jets are not compatible with the Keihin emulsion tube/jets - they use different threads. There are even FAKE Dynojet kits that have shown up on the market, presumably from China ((Fake DJ Kit - https://www.dynojet.com/warnings/PressReleaseKnockOffJetKits.pdf)) | ||
| - | To check for DynoJet parts, look at these 4 things: ((Identify DJ vs Keihin - http://xlforum.net/forums/showpost.php?p=5238545)) | + | **__To check for DynoJet parts, look at these 4 things:__** ((Identify DJ vs Keihin - http://xlforum.net/forums/showpost.php?p=5238545)) |
| * Check the Needle: Stock is Nail-shaped - DJ has grooves & a clip | * Check the Needle: Stock is Nail-shaped - DJ has grooves & a clip | ||
| * Check the Diaphragm/Slide Spring: Stock is 6.0" - DJ is 5.75" | * Check the Diaphragm/Slide Spring: Stock is 6.0" - DJ is 5.75" | ||
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| {{ :techtalk:evo:carb:dynojet-pressrelease-knockoffjetkits.pdf |}} | {{ :techtalk:evo:carb:dynojet-pressrelease-knockoffjetkits.pdf |}} | ||
| - | While some people have had satisfactory results with the DJ kits, if you are having trouble getting a good tune on the carb, I would remove all DJ items and restore the carb to Keihin parts including buying another slide if it's been drilled. The stock parts are good quality and will provide excellent operation if the carb is tuned properly. | + | While some people have had satisfactory results with the DJ kits, if you are having trouble getting a good tune on the carb, remove all DJ items and restore the carb to Keihin parts including buying another slide if it's been drilled. The stock parts are good quality and will provide excellent operation if the carb is tuned properly. ((the opinion of many on the XLForum)) |
| From the factory, there is a cap over the Idle Mixture Screw. This needs to be removed to make IMS adjustments during tuning. It does not need to be replaced when done, but the cap is available as HD P/N 28015-01 if you would like to replace it when done making changes.((IMS Cap - http://xlforum.net/forums/showpost.php?p=595622&postcount=9)) | From the factory, there is a cap over the Idle Mixture Screw. This needs to be removed to make IMS adjustments during tuning. It does not need to be replaced when done, but the cap is available as HD P/N 28015-01 if you would like to replace it when done making changes.((IMS Cap - http://xlforum.net/forums/showpost.php?p=595622&postcount=9)) | ||
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| |Fuel Float Valve |(Y/N - Cleaned & Checked, Replaced)| | |Fuel Float Valve |(Y/N - Cleaned & Checked, Replaced)| | ||
| - | **TIP - 883 or 1200** ((Decman of the XLForum - xlforum.net/forums/showpost.php?p=3171730)) | + | | **TIP - 883 or 1200** ((Decman of the XLForum - xlforum.net/forums/showpost.php?p=3171730))\\ If you don't know your engine size, check it with a straw - Like this:\\ * Put in 5th gear\\ * Lift rear wheel\\ * Remove spark plugs\\ * Place a long plastic straw, chopstick, etc. in the spark plug hole\\ {{:techtalk:evo:engmech:measure-883-1200.jpg?120|}}\\ * Rotate tire to move cylinder to bottom dead center - lowest straw position\\ * Check cylinder diagonal dimension from far bottom of cylinder to top lip of spark plug hole\\ * 883 bore = 5.5" Diagonally ---- (Actual Bore Dia. is 3.000)\\ * 1200 bore = 5.875" Diagonally - (Actual Bore Dia. is 3.498)\\ The plastic straw is unable to damage the cylinder and unlikely to fall into the cavity...\\ | |
| - | If you don't know your engine size, check it with a straw - Like this: | + | |
| - | * Put in 5th gear | + | |
| - | * Lift rear wheel | + | |
| - | * Remove spark plugs | + | |
| - | * Place a long plastic straw, chopstick, etc. in the spark plug hole | + | |
| - | * Rotate tire to move cylinder to bottom dead center - lowest straw position | + | |
| - | * Check cylinder diagonal dimension from far bottom of cylinder to top lip of spark plug hole | + | |
| - | * 883 bore = 5.5" Diagonally ---- (Actual Bore Dia. is 3.000) | + | |
| - | * 1200 bore = 5.875" Diagonally - (Actual Bore Dia. is 3.498) | + | |
| - | The plastic straw is unable to damage the cylinder and unlikely to fall into the cavity... | + | |
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