1/2 choke

21 replies to this topic
  • BrianVT

Posted March 18, 2004 - 05:17 AM


My 650R starts/runs fine. Half choke has never had any effect(since I got it)whether bike's warm or cold.
Problem ? :)
Uncorked, drilled stock tip, 175 main, 68s pilot, 1300'.

  • TimBrp

Posted March 18, 2004 - 07:27 AM


You have the stock needle in there Brian??

  • BrianVT

Posted March 18, 2004 - 07:44 AM


I'm not sure. :)

  • slowxr

Posted March 18, 2004 - 07:45 AM


Mine does the same with similiar jetting. Full choke will kill the engine but 1/2 choke makes no change in engine speed.

  • TimBrp

Posted March 18, 2004 - 07:59 AM


There should be some change, but minimal at most. Brian your a little higher in elevation than me but I'm going to try the 172 main and see how that works out. Maybe were a little on the rich side. :) But I would check the needle/clip position, I don't know how to tell between the Honda comp one and stock. Then see if it has an effect on the bike at all.

  • BrianVT

Posted March 18, 2004 - 08:03 AM


It doesn't bother me but I just read about the choke plate problem.
I'm wondering if my choke plate has been planning to suicide-bomb my motor during this Sunday's enduro. I always get paranoid before the 1st ride of the year. :)

  • TimBrp

Posted March 18, 2004 - 08:59 AM


I wouldn't stress over it to much. The probability of that happening is quite low. However, I'm pissed that I bought that piece and now I can't find it.. :) I'm going to replace it sooner than later though.

  • qadsan

Posted March 18, 2004 - 09:32 AM


I'm pissed that I bought that piece and now I can't find it..

And I thought I was the only one who does this :)

  • SaltyWalrus

Posted March 18, 2004 - 10:55 AM


TimBRP, do you have a link to that choke part that you bought...that you lost? I didn't see it on XR's Only web site. Thanks.

  • BrianVT

Posted March 18, 2004 - 04:58 PM


...I'm going to try the 172 main and see how that works out. Maybe were a little on the rich side.

It came with a Big Gun exhaust and a 170 and I ran it fine last year. The enduro I'm running Sunday requires a spark arrestor, which the Big Gun doesn't have. I just threw on a stock exhaust (that I bought on E-Bay just for the hell of it 'cuz it was cheap ($40) last year), drilled it, and put in a 175. I bought a 172 also but at sea level and 50 deg. I'm gonna err on the rich side. I'll let you know results if I mess with it in warmer weather.
B.t.w., I might keep the stocker on there. Wanna buy a Big Gun ? :)

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  • adam574

Posted March 18, 2004 - 06:20 PM


what choke problem are you talking about that could grenade my motor???

  • TimBrp

Posted March 19, 2004 - 04:28 AM


I'm all set with a big gun. I'm buying the E-series from BobIT soon...can't wait.

  • BrianVT

Posted March 19, 2004 - 09:34 AM


It's on a 600, but close enough to feed my paranoia. :)

  • TimBrp

Posted March 22, 2004 - 02:58 AM


Just found my aftermarket billet one. Installing tonight. Watch out when you buy one those little bolts get lost quick. Going to lowes to try and find another.

  • BrianVT

Posted March 22, 2004 - 10:22 AM


A little off topic but, I ran a TIGHT enduro yesterday and stalled from bouncing off trees alot. I had a miserable time restarting all day. Wore me out. It was down at sea level (it's fine at 1300'), 50 degrees, 175 main, 68s pilot.
Would a 70 pilot have helped or should I have messed with the air(fuel?) screw ?

  • TimBrp

Posted March 22, 2004 - 10:43 AM


Brian I'd say air/fuel screw. However think about the float convo I was having with OLD MAN there.. float adjusting . Sounds like it could be somewhat relevant to your issue. You may be even to rich at times. who knows. It's trial and error.

  • needsprayer

Posted March 22, 2004 - 10:46 AM


Jetting Guide from The Pig Pen

Sea level and 50F
A 70 pilot is recommended.

If you flooded then turn off the fuel, hold the throttle WTO, pull in decompression lever and kick through 5-6 times to clear excess fuel. Turn on fuel and start.

  • TimBrp

Posted March 22, 2004 - 11:02 AM


Turn your idle up and see if that helps. If it runs on it may be too lean also..

  • BrianVT

Posted March 22, 2004 - 11:16 AM


Here's a wrench in the story (we never give you all the info you need, right ?). Later in the race I figured out that if I gave it half or more throttle (big no-no, right ?) it would start. It was often hot, 250 deg., (I love my new temp. guage) and boiled over in a couple of the mud bogs. I did get some backfires after the failed kicks.
I just checked my fuel screw and it was 2 1/2 out.
Make any sense to anyone ?
I appreciate your attention, guys.

  • adam574

Posted March 22, 2004 - 12:55 PM


where did you get the temp gauge... is it the one that goes inplace of the dipstick

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