Intake — Suzuki DR650 Wiki

1 Фев 2015 | Author: | Комментарии к записи Intake — Suzuki DR650 Wiki отключены
Suzuki DR 350 S


On the 96-Present DR650SE’s the system is the most restrictive of the motorcycle in overall performance and operation. In stock condition the air box and rubber intake snorkel 14) severely restrict air flow through the engine.

There are a of mods that have done to increase air flow removing the snorkel, removing the air box cover (6), removing the air screen (5), modifying the top of the Other air flow improving involve adding one or multiple vents, velocity stacks or plain drilling holes in the box. Whatever mod you decide to do the proper carb jetting to the air/fuel ratio at the proper

Standard on the Mikuni BST 40SS is; main 140, pilot needle 6F19 clip on 3rd (Australian, Canadian and UK needle). All US use a 6F23 fixed clip jet needle and a Y-5M needle The most popular jetting kit for the carb is Dynojet Research’s

The most complete kit is Procycle’s carb jet kit. Other are Factory Pro’s kit. kit is based on leaving the air box in it’s form.

There is a ton of information here on and other jetting mods for the CV carb.

When swapping with other DR riders do not the size difference between and DynoJet main jets ie a 140 is roughly equivalent to a DJ 150.

to the stock intake system can

Adjusting the very lean set pilot circuit. Remove the installed pilot screw plug by increasing the weep size so you can screw in a wood or sheetmetal screw to remove the Most machines run very with the pilot screw set 1 and 1-1/4 turns out from seated.

Removing the snorkel (More

Raising the stock needle (Best for stock in combination snorkel removal).

Drilling 2nd in carb slide (Improve response speed).

Shortening the spring (Decrease the preload increase slide speed more).

New Y-5M needle jet (If the OEM one wears you get a big off bog and it will seem to run rich).

the top of the airbox (Even more air but a complete re-jet using the or Dynojet kits mentioned

You need to read the above to get a grasp of what (if any) these would be on your in your situation.

Of course if you want to boost performance, response and engine smoothness you to remove the CV carb and replace it a direct operated slide like Keihin’s FCR series or Mikuni’s TM series carb. For the industrious there is no doubt a injection system would be the addition but the work required to fab own system would be a large starting here.

There is now a fuel injection kit for the DR from Ecotrons which very promising. Over in the forum there is testing and of the Ecotrons DR650 Fuel Project.

Here’s a link to mxrob’s Fuel Injection Project on

Here’s the condensed version of Fuel injection project on

Links that can help

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