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Discussion in 'Thumpers' started by CSMonte, Dec 8, 2008.
You might post this over on the XL600 thread and the flea market.
thought stock was 39 but anyways...
I have mine but im en el salvador...shipping might not be worth it, however mine has been rebuilt, has a custom choke flap, new float valve and needle, new splash guard, new gaskets, new acv valve and new fuel screw...so its a great runner...
pleanty of jets too..
Could be 39, I just assumed as many 600-650s seem to use 40mm. Yours sounds like great, but probably to expensive to ship. Ill keep it in mind incase I dont find one closer.
yup..let me know
....get one that has been rebuilt...or at least has a new float valve or acv valve, these are the things that cause the most issues with idling and poor performance...
sometimes getting a cheap one bites you in the butt
Any interest in carb adapters for the newer-style FCR MX carbs? I used one of Noss' universal FCR adapters on my 650R with a 39mm FCR off a late-model CRF450 and it ripped, but the adapter dimensions weren't quite right. So we're going to have them make some custom adapters for the XR650R and the XR650L. I don't have a 650R anymore, but my buddy James wants one and I need to have some 650L adapters made for these bikes. Figured we might as well make them available. His regular universal adapters cost $65, so am guessing these will probably be a little bit more expensive, but can't imagine they'll end up costing any more than $80. It's pretty easy to find good deals on used FCR MX carbs ($300?) because there are so many of them out there (being used on virtually all of the modern 450cc motorcross bikes). So this can be a relatively low-cost upgrade, and the performance is flat-out awesome. Fitment is also pretty straightforward. There are no clearance issues, so this is literally a bolt-in deal and you can even use the stock FCR throttle cables and twist-grip (stock CRF cables are perfect length with aftermarket tripleclamps and taller bars).
We're definitely going to make the XR650R and XR650L adapters, and I have all the dimensions for the XR600 adapters, but I'd like to know if there's any demand for an XR600 version before we shell-out a bunch of money. So please shoot me a PM if you want one!
those in the know say that by and far the fcr39mm is a better fit and performance in the case of the xr600, the 41mm is a bit big and needs more tuning and or mods to work perfect...at least those that have done these swaps a lot...
I got my flatslide which is no pumper or fcr BUT its good for now
maybe next year for me!
Sure why not , I have this for my L but havent pullked the trigger on the Noss , My understanding is its a bit of a sloppy fit to te boot .
speaking of carbs and whatnot whats your opinion of this?
Oh Oh Oh Me Me Me!!!!
That is a spark plug!!!!
Looks pretty good. My bad eyes can't tell about the center electrode. Maybe a tick lean BUT not bad.
looks pretty lean to me..
I am buying ShooterDaves XR400 oil cooler for ya.
ok WATTNER since Im quite the smartass myself have a beer on me! you get 100 points!
or if and when you guys get down here a real beer at the bar...
YES ITS A SPARKPLUG! its a cool ngk dpr8ea-9, or for those that dont know a normal riding plug for the xr600 and xrl
any comments on how its burning would be cool since its showing what a rejetted mikuni flatslide and HRC CAM by cw do to normal fuel consumption aka it goes insanely rich if you leave the jets how they were before the swap
can you keep it till christmas? need to save up! or wait for my wifes present! jajaja
I gave up on finding an appropriately sized cooler here...that and most are solid steel and all rusty looking...
I can do with make lines and or adapters here at any of the industrial hose shops...I made a bunch for my truck here including the powersteering lines...
Ill show you guys a pic of the plug before the jet down..it had a 230main and needle at richest clip
the center electriode is that grey tan color all the way down...
Im trying to get this perfect so I can get all the punch from this cam swap!
it really is making a difference once the jetting gets tuned...massive amounts of midrange and I can keep a gear longer or rev it out more which is taking A LOT to get used too! since the xr is famous for shortshifting and or lugging gears...
here is a pic of a DPR 9 plug or one cooler that I was using for high speed runs...its looks more tan and it had the needle at richest setting...jet was a 220 however I had a flattness at 3/4 throttle and my intake was stained red with fuel....
tell me about it! that aint no christmas present! jajajajajajajajajajajajajajajja
no I was thinking:
hey hunny what do you want for christmas???? and I would say
AN XR400 cooler that steve has for me
yeah wishful thinking huh?
Silence ...... All are silent!
Keep a secret?????:eek1
I'm ignoramus, but I want to know.
Me too :) I also want to know what's the diference in crankshafts and pistons!
like many have said BEFORE
different PART NUMBERS DOES NOT MEAN DIFFERNT PARTS!
I suspect that for some reason older parts even though the same have higher prices than new
I have conformed this on some parts that are intercheangeable on my 88 bike and buying newer parts from 2000xr models
one example, bearings, second example pulse generator and coils
just one of those things
for all accounst and purposed all XRL, XR600 SINGLE CARB HEADS ARE ALL INTERCHANGEABLE!
HOWEVER you have to plug up the smog holes if using an xrl head on the xr600, also the xrl head has no decompressor assembly...a lot if xr650l riders use an xr600 head so they can use the manual decompressor when adapting the kickstart mechanism to their bikes
hope this helps