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[RZRob]

Originally Posted by ONandOFF

the usual suspect is the CDI unit.

Ding ding ding... Was researching concurrently and everything pointed to this. Decided to go out and give it a tap. Got my spark back.

Pesky CDI unit.

RZ Rob

[techforlife]

Originally Posted by RZRob

Ding ding ding... Was researching concurrently and everything pointed to this. Decided to go out and give it a tap. Got my spark back.

Pesky CDI unit.

RZ Rob

http://www.thumpertalk.com/topic/881...lp-cdi-repair/








B

[mcma111]

Originally Posted by RZRob

Ding ding ding... Was researching concurrently and everything pointed to this. Decided to go out and give it a tap. Got my spark back.

Pesky CDI unit.

RZ Rob

Looks like your in the market for a new CDI.

[ThumpnRed]

Originally Posted by RZRob

Ding ding ding... Was researching concurrently and everything pointed to this. Decided to go out and give it a tap. Got my spark back.

Pesky CDI unit.

RZ Rob

That's why I have a spare with me whenever I go out and play in the woods...

[RZRob]

Originally Posted by techforlife

http://www.thumpertalk.com/topic/881...lp-cdi-repair/

B

Yes, good read. Thanks.

Originally Posted by mcma111

Looks like your in the market for a new CDI.

Yes sir, I believe you're right - or better yet, one that's already had the treatment done.

Originally Posted by ThumpnRed

That's why I have a spare with me whenever I go out and play in the woods...

That or a big rock. Good idea.

RZ Rob

[HeadTrauma]

Originally Posted by techforlife

if a fuel injection system is in open loop it relies heavily on the coolant/intake temp sensors for fuel mangement.........

B

Open loop can actually work pretty well (certainly no worse than a carburetor) and a lot of first generation systems ignore the O2 output at high load anyway. Now that many new cars come with wideband sensors, they can monitor AFR all the time.

Originally Posted by techforlife

1.) Fuel injection is hands down the best way to fuel an engine,,,

2.) bikes seem to be problematic usually due to enviroment/dirt and the fact they can`t seem to make a decent fuel pump

1.) I agree.

2.) Offroad bikes are hard on electronics in general, especially singles. If it's not water or dirt intrusion, then the vibration kills something. The XRL's CDI is an example and those are potted in epoxy as you already know. The MegaSquirt ECUs I have with all the through-hole components would not fare well on an XR. One with all SMD components like a MicroSquirt or pcb v3.57 would be much better options.

[RZRob]

Hi Folks,

So, I've got a couple XR650Ls and both have FMF exhausts. One has the PowerCore 4 with PowerBomb and the other has the Q2.

So, I'm noticing two mounting choices:
So most, including mine (this isn't my bike) have the hanger mounted here


But others (including my Q2) are mounted further forward.
I think aesthetically I like the further forward, but I don't think that would be as strong or maybe even not strong enough.

What do you guys think? Is one "right"?

RZ Rob

[fritzcoinc]

Originally Posted by RZRob

Hi Folks,

So, I've got a couple XR650Ls and both have FMF exhausts. One has the PowerCore 4 with PowerBomb and the other has the Q2.

So, I'm noticing two mounting choices:
So most, including mine (this isn't my bike) have the hanger mounted here


But others (including my Q2) are mounted further forward.
I think aesthetically I like the further forward, but I don't think that would be as strong or maybe even not strong enough.

What do you guys think? Is one "right"?

RZ Rob

Got enough shinny gooey stuff on that bike?
Do you run a used bike lot or something?
Don't you just slide right off that seat?

RZRob's Used Dirt Bike's
Your Job is your credit!
We carry your note.
Tail light warranty on every sale.

[marlinjames]

Originally Posted by RZRob

Hi Folks,

So, I've got a couple XR650Ls and both have FMF exhausts. One has the PowerCore 4 with PowerBomb and the other has the Q2.

So, I'm noticing two mounting choices:
So most, including mine (this isn't my bike) have the hanger mounted here


But others (including my Q2) are mounted further forward.
I think aesthetically I like the further forward, but I don't think that would be as strong or maybe even not strong enough.

What do you guys think? Is one "right"?

RZ Rob

It looks a lot better but i agree i dont think it would be as strong. Lots of leverage and weight hanging out there.

[Spud Rider]

Originally Posted by ONandOFF

The sprocket I "worked onto" my not-noticeably-worn countershaft is a JT F1307 - not sure how that compares to the PBI/Moose But I didn't grind anything. I did, however, tap gently with a hammer going around the edge on a large sprocket inverted over the shaft. If banged hard enough, it could damage the housing on the opposite side.

I only needed to tap gently with a hammer to install my PBI, XR650R C/S sprocket the first time. All subsequent removals and installations were accomplished easily by hand.

Spud

[mendoteach]

RZ Rob, go with the Far back mounting.

[Brown Falcon]

Originally Posted by marlinjames

I just got doing the dave's mod and it all went smooth. bike started right up barely had to tap the starter. i let it wram up for a awhile and took it for a ride. it runs fine at about a quarter throttle but if i open it up it jokes out and spudders but still kinda accelerates. Guessing i have the air fuel mixture off? i backed it out the 2 1/2 turns.
Im at sealevel in washington state with stock exhaust. oh and i used a 55 and a 155 jets, it was suggested to use a 158 but had already ordered the 155 and couldnt find one local so i figured i would try it. its in my shopping cart for my next order

Try adjusting the mixture screw the "Spud Way":

1) Get the bike up to operating temp
2) While idling, slowly turn screw in until the idle gets rough
3) Slowly turn screw back out until idle gets smooth again

If after this it is adjusted way too far in, or too far out, you may need smaller/bigger jets. I tried the 55/158 jetting on mine (live at 350ft and ride up to 4k or so) and it was WAY rich. I have 52/155 jetting in now and it seems to be better. Adjust the screw how I told you, put a new plug in, put some miles on it, and then do a plug check to see where you're at.

[RZRob]

Originally Posted by fritzcoinc

Got enough shinny gooey stuff on that bike?
Do you run a used bike lot or something?
Don't you just slide right off that seat?

RZRob's Used Dirt Bike's
Your Job is your credit!
We carry your note.
Tail light warranty on every sale.

That is too funny. I doused it in Pledge and am letting it soak in overnight to get it back to black. It really makes a huge difference - especially on the controls and black/red bits.

The white bike with the red tank is my '99 that I've had for awhile, but the one behind it is a really fresh '06 I just picked up. The white one has served me well. I'm trying to prep it for it's new owner.

RZ Rob

[fritzcoinc]

Originally Posted by RZRob

To say I'm pissed is an understatement. So like I've been doing a lot with my bike, but the last thing I've done (it was running before) was changed the camshaft - and now I've got no spark. Recently I looked at the ground bolt on the frame when I had this issue, but that doesn't seem to be the problem.

Can you guys start rattling off the usual suspects?

I've been unplugging stuff and plugging it back in, but when I check the coil, got no voltage across the 2 wires.

HELP - I'M STARTING TO STRESS OUT!!!!!

RZ Rob

Calm down, back away from the bike, it just ain't happen! We are here to help.
Kill switch, recently mine has been f__ken up.
CDI, I always carry a spare. Techforlife can rebuild these. But it will cost you your shirt!
Side stand safety switch. all the safties can be delt with at the wire junction under the seat.

[RZRob]

Originally Posted by mendoteach

RZ Rob, go with the Far back mounting.

I was hoping you'd say that, because that's where it is on the PC4 and it left a mark where the clamp was, that you'd see if I moved the clamp forward.

RZ Rob