Power Restrictor Kit - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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  • 1 Post By pdwestman
 
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post #1 of 8 Old 04-23-2017, 03:16 AM Thread Starter
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Power Restrictor Kit

I just picked up a second KLR650 off ebay that I intend to tidy up and use for next winter. The old paperwork has a workshop receipt for fitting a power restrictor kit (to allow the bike to be used for learners).

Any idea what this would have been? The learner limit in the UK is 33bhp so I'd like to remove it (whatever 'it' is).

ta
stuart
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post #2 of 8 Old 04-23-2017, 04:27 AM
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I would guess that it would amount to a metal plate between the exit of the Carburetor and the entrance to the Cylinder Head. This metal plate would have a hole in it that is smaller in diameter than the throat of the Carburetor. Hence the term "restrictor." The metal plate need not be very thick. As there isn't much room, or distance between the Carburetor and the Cylinder Head on a KLR 650 it should be fairly easy to locate and to remove. At least as "easy" (or as difficult/anoying) as removing and replacing the Intake Manifold.
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post #3 of 8 Old 04-23-2017, 01:09 PM Thread Starter
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Thanks for the quick reply - I will go carb hunting :-)

thanks
stuart (UK)
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post #4 of 8 Old 04-23-2017, 01:13 PM
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could be a restrictor plate or a throttle position limiter. .....funny thing is that a bone stock, unrestricted, KLR is only capable of 33 - 34hp anyhow so nothing should have been required in any case.

Dave
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post #5 of 8 Old 04-24-2017, 12:38 AM
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Could depend on the HP rating system that the regulation uses. Ex: SAE, DIN and JIS Probably not JIS but could be either SAE or DIN I suppose. (FWIW: SAE = US, DIN = Germany, JIS = Japan) Also depends on where they're measuring it. Ex: Crankshaft, Transmission Output Sprocket or Rear Wheel.

Last edited by Bluehighways; 04-24-2017 at 12:41 AM.
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post #6 of 8 Old 04-24-2017, 09:49 AM
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Savvy shop should know the answer and how to defeat it, IMHO.
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post #7 of 8 Old 04-24-2017, 01:28 PM
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Quote:
Originally Posted by Damocles View Post
Savvy shop should know the answer and how to defeat it, IMHO.
From reading postings from 'down under' (Aus/NZ), there may be an Extra vacuum air hole in the aluminum throttle slide.

The throttle slide has an air hole ahead of the mid-range jet needle.
Some CV carb equipped "de-tuned" slides have an Extra air hole near the top front of the slide near the rubber diaphragm.
If I understand the theory correctly, when the normal vacuum raises the slide to a point that the extra air hole slides Above the upper lip of the slide guide it lets the vacuum Out. Keeps the throttle slide from opening completely.

Our member "tasman" from down-under could possibly confirm.

Just fill that upper air hole with epoxy glue. Gently place a piece of tape over the glue and allow to cure.
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pdwestman
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post #8 of 8 Old 04-25-2017, 11:42 PM
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There may also be some radiator hoses attached to the carburetor on Australian models which can be removed.
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