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February 13th, 2008, 02:52 PM   #1
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Question: FCR accelarator pump cover,change?

Hello bergers around the world ,

I wonder if aftermarket accelarator pump cover for FCR can improve performance of engine and works nice generally.I tried to fit one of them but when I install it in my 07 FS650e doesnt work.The engine increases RPM difficult and doesnt work properly.I dont know what goes rong with my berg guys but some friends install it in some KTMs and some CRFs with efficient results.I thought that maybe the FCRs of the crfs have different adjustments and are from different producer but in the and I couldent found out what goes rong


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Sotosberg

07 fs650e
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February 13th, 2008, 03:31 PM   #2
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The general consensus here is that these oversize pump covers do little if anything to help with the fuel delivery. Many will restrict or limit the accelerator pumps squirt and even remove it altogether (Dale Lineaweavers kit). You have now probably increased the volume of fuel the pump delivers and are overly rich. You may want to reduce the pump squirt and richen the needle jet either by replacing it or raising the needle. Dales kit works well with the 550 and 650 but absolutely requires complete accelerator pump removal.
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February 13th, 2008, 04:13 PM   #3
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Sotosberg

You might do better with telling us a little more about the specs
in your carb? You should try this:

50 pilot jet
std needle? obdvt=3rd clip up from bottom
2 to 2 1/2 open on fuel screw
162 main jet

This set up even made dirtrider's staff happy!

Boss
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February 13th, 2008, 04:23 PM   #4
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I still use the AP with a Lineaweaver needle in my 650. I did restrict the stroke though as it was a bit too much like hard work with the standard stroke. Without, there is a bit of a delay, so some AP is good.

A pic of my mod is here:
http://www.husaberg.org/index.php?set_a ... _photo.php

Others do it differently.

I can't quote my jetting as I've yet to pull the carb down after it was dynoed and jetted to suit a muffler mod. The dyno guy was very complimentary of the Lineaweaver needle.

There is a copy of the dyno curves in my gallery too. 63 equivalent Dynojet hp at the knobs makes for a fun dirt bike.

Steve
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February 13th, 2008, 05:44 PM   #5
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I'm with you Steve.DL's kit with the AP but with the pump squirt restricted to sub 1 sec.Same mod.Works best for the 550 I found.
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February 14th, 2008, 03:33 AM   #6
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Thanks for reply guys!!!

The truth is that I didnt search it a lot with carburator settings because the installation manual of this aftermarket APC talks about simple bolt on without changeing everything but includes one filler for adjusting the stroke clearence of AP in case you have change it.This filler adjust it into factory settings 0.20 mm if I am right.
So in the end the best I can do is to buy a Lineaweaver jetting kit and restrict the AP?Steves idea sounds goods also.
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February 14th, 2008, 05:00 AM   #7
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February 14th, 2008, 05:23 AM   #8
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aaaaaaaaaaaaaaaaaaaaaaaaaaaaa,so this is the kit.I had seen this photo before in other topics,now I understand.
Guys let me know about that,is it easy to find it somewhere in the net or I will have to contact with Mr Dale?
From theese I had readen in older topics,I think its worth a lot to install it...
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February 14th, 2008, 05:31 AM   #9
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Originally Posted by sotosberg
aaaaaaaaaaaaaaaaaaaaaaaaaaaaa,so this is the kit.I had seen this photo before in other topics,now I understand.
Guys let me know about that,is it easy to find it somewhere in the net or I will have to contact with Mr Dale?
From theese I had readen in older topics,I think its worth a lot to install it...
http://www.d-lineaweaver.com/
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February 14th, 2008, 05:43 AM   #10
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Thanks Husabutt
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accelarator, change, cover, fcr, pump, question



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