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July 29th, 2017, 10:55 PM   #51
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I did notice a whilstle or kind of chirp like a cricket. When I opened the throttle. Think I may have a little air leak.


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July 30th, 2017, 05:22 AM   #52
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Originally Posted by gregfreefaller View Post
I did notice a whilstle or kind of chirp like a cricket. When I opened the throttle. Think I may have a little air leak.


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My former 2005 FE650E with the factory FCR carb had a little bit of a chirp/whistle as well at certain throttle openings but ran flawlessly.
May just be a trait with these carbs and the only reason we here it is because of the air intake being up top and close to us with no airbox to muffle it as on other makes.
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July 30th, 2017, 08:12 AM   #53
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I love the chirp
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July 30th, 2017, 08:12 AM   #54
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So it's common then? That would save me trying to find it lol.


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August 5th, 2017, 01:50 AM   #55
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Gregs 2002 FS650 project / rebuild.

So today's job, set the float height and take the bike out again.

Last weekend I had the 170 main jet in, this week I've dropped to the 168. It didn't bog at all but it certainly didn't feel as strong as the 170. So I think it's the 170 I'll use and move onto setting up the clip position.

I've also re adjusted and trimmed all the rubber parts from frame to head. Fits nice now. I found that with the machined adapter that it was firstly hard the get the fit just right which could provide a source of air ingress and also when I tried to adjust the fitting it span round and moved. It's now bonded in place and is a permanent fitting. Life's much easier.

I think it would have been easier to buy a berg keihin to start with instead of modifying a crf. I'm enjoying the tinkering though!




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Last edited by gregfreefaller; August 5th, 2017 at 01:52 AM.
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August 5th, 2017, 07:47 AM   #56
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I've only just realised, I have a new head in the cupboard. Got the dual valve springs inside, modded decomp and the 08 cam. My carb will need rejetting again I'm guessing once all these bits are fitted!!!


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August 13th, 2017, 04:11 AM   #57
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Been down the garage and finally had a good day.

The weather held off so I stuck the 170 jet back in and went out. Certainly better at top end. In the 170 will stay.

To be honest the mid range feel superb. It pulls like a train from a slight roll all the way to that corner is coming really quick.

I fiddled the air screw at the bottom in 90 chunks and it's around 2 turns out. The bottom end is pretty scary. Wheel will lift in pretty much 1-4.

The carb is now set up and in place, I'm pretty happy. I may fiddle a bit more as time goes on, but it's certainly better than my DO.



Quick photo.
CRF 450 carb
Taffys jet kit
Bellmouth adapter from ebay.
Trimmed inlet and outlet rubber
Drain plug- mx dude.ebay



Now I need to fit

-dual fuel lines
-drain hoses -blue of course.
-rebuild

Next job!






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August 13th, 2017, 08:34 AM   #58
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Good to hear you're getting some well earned play out of it Greg.
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August 13th, 2017, 10:29 PM   #59
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Few pictures....




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August 15th, 2017, 10:58 AM   #60
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Well I thought I had the jetting right......

Kicked her, she started first kick. Rode down the road and notice it was a bit jumpy or hesitant in the low revs. Like when you first start off. It seemed to choke then jump forwards.

I rode it for a fair few miles, opened the throttle quickly and it died. Started it, a couple more miles but it seemed rougher than usual with a cough everyso often. Then it cut out again.

A few kicks a stops later I got it back home.....,


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