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 Making a better road bike (XR650L)
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jscompto
Franklin, IN

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USA
56 Posts

Topic started on 09/05/2007 at 7:31:12 PM  Member Profile  Reply with Quote
Hey everyone,
I have a 1996 Honda XR650L and I have had it for a couple of weeks now. The bike has 10,200 miles on it and was barely road ridden. I have just bought some road tires for the bike to make it more road worthy, and have been reading about some other things I can do to the bike to make it better on the road. It already has the "baja racing kit" from IMS , which is basically removal of the smog pump/charcoal canister, but when I ride on the interstate, the bike seems to be keeping up with traffic at about 2/3 - 3/4 throttle. I know a bigger sprocket in back and smaller in front will help, but is there anything else i can do engine wise to get a little better rpm range? I am sure someone out there knows how to spruce up the 650L and make it a better road bike. Thanks and reply if you can help!

1996 XR650L -> 103mm piston, stainless header, cbr wheels, fcr 41 carb, underseat exhaust, 5.8 gallon acerbis tank, trailtech vapor computer, and much more
1999 CR250R -> FMF Gnarly pipe, FMF turbine core 2 silencer, twin air filter, 54T rear sprocket, great for off road riding...

sparta4188
Sparta, NJ

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USA
1073 Posts

Posted on 09/05/2007 at 8:05:43 PM  Member Profile  Reply with Quote
You can get a new CDI chip to make it rev up to a thousand or more rpms more but without alot of mods on the bike you wont really feel it

01 400EX

250f canuck
Super Tuner

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Canada
2213 Posts

Posted on 09/05/2007 at 8:12:57 PM  Member Profile  Click to see 250f canuck's MSN Messenger address  Reply with Quote
Do a search for Dave's mods, they apparently really perk the 650L up.




01 WR250F - with lots of goodies

xr500rc
Redpa, Tas

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Australia
84 Posts

Posted on 09/05/2007 at 8:52:03 PM  Member Profile  Reply with Quote
oh yeah mate before you get sprockets you need to go bigger front, smaller back, otherwise you lower the gearing and make it worse

XR250R, XR500R

dave_cl
Central NY

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USA
1491 Posts

Posted on 09/06/2007 at 4:47:23 PM  Member Profile  Visit dave_cl's Homepage  Reply with Quote
quote:
Originally posted by sparta4188

You can get a new CDI chip to make it rev up to a thousand or more rpms more but without alot of mods on the bike you wont really feel it

Are y'all funnin, or are ya holdin' out on us?

Dave

01 XR650L - Keihin 158 main jet, 55 'long' pilot jet, screw out 2.5 turns, stock needle shimmed 0.035, slide holes drilled to 5/32, dynojet shorter CV spring installed, foam filter, snorkel removed, stock exhaust, air pump removed, thermometer dipstick, XCMH fr/r tires, 14-48 spkts.

Old dog
Yellowknife

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Canada
299 Posts

Posted on 09/06/2007 at 7:44:08 PM  Member Profile  Visit Old dog's Homepage  Reply with Quote
Hmmmmmmm ...... "CDI chip" ........ I gots ta get me one o' those!!

06 XR650L - 4.7 Clarke tank, Tusk gas cap, Big Gun Evo-X muffler, FMF PB header, UNI filter, de-smogged, Moose s/s x-wide pegs, Kouba link, BD LED tail light, Maier rear fender, dual headlights, Buell lightning bug screen, SuperBrace, Acerbis Rally Pro handguards, Dirstskins fork seal protectors, Steahl bash plate, XRs Only case saver, Corbin seat, custom high riser, K&N crankcase breather, Sudco 41mm FCR carb w/Motion Pro cables & throttle, East Coast & Sumo wheels, Acerbis Supermoto front fender, MSR rear shark fin, Scotts Damper.
- Donated to the support of 4Strokes.com

sparta4188
Sparta, NJ

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USA
1073 Posts

Posted on 09/06/2007 at 8:29:46 PM  Member Profile  Reply with Quote
lol no a cdi box!!1

01 400EX

dave_cl
Central NY

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USA
1491 Posts

Posted on 09/07/2007 at 6:11:09 PM  Member Profile  Visit dave_cl's Homepage  Reply with Quote
quote:
Originally posted by sparta4188

lol no a cdi box!!1

Well, have you found a source that makes a hi-perf CDI for the L?

Or are you just making us feel bad because no one does?

'Fess up!


Dave

01 XR650L - Keihin 158 main jet, 55 'long' pilot jet, screw out 2.5 turns, stock needle shimmed 0.035, slide holes drilled to 5/32, dynojet shorter CV spring installed, foam filter, snorkel removed, stock exhaust, air pump removed, thermometer dipstick, XCMH fr/r tires, 14-48 spkts.

jscompto
Franklin, IN

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USA
56 Posts

Posted on 09/07/2007 at 10:59:58 PM  Member Profile  Reply with Quote
would anyone suggest flywheel weights, and if so, what size? Would that give me a better RPM range? Hey sparta, where do i find a high performance cdi?

1996 XR650L -> 103mm piston, stainless header, cbr wheels, fcr 41 carb, underseat exhaust, 5.8 gallon acerbis tank, trailtech vapor computer, and much more
1999 CR250R -> FMF Gnarly pipe, FMF turbine core 2 silencer, twin air filter, 54T rear sprocket, great for off road riding...

4StroKen
Yorba Linda, CA

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USA
1343 Posts

Posted on 09/08/2007 at 01:30:18 AM  Member Profile  Reply with Quote
I've been gone a while but... I do believe the flywheel weights will give you bottom end grunt .
If you want more hiway cruzability then do the daves mods to the carb and maybe a rear section exhaust,, but the thing thats gonna help the most is gearing ,, meaning smaller front sprocket and then try smaller rear sprocket.

One tooth smaller int the front is like 4 teeth smaller in the rear
so whatever the front sprocket is now go One size smaller
you will feel more top end speed and you will get longer times between shifts when accelerating. If thats not enough for you then go to the rear and get a longer chain to fit.

"a few china quads and a ttr 125"

Greasser
Willow Spgs, MO

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USA
281 Posts

Posted on 09/09/2007 at 07:47:15 AM  Member Profile  Send Greasser a Yahoo! Message  Reply with Quote
For top end driveability i think you mean 1 tooth "Bigger" front sprocket is the same as 4 teeth "Smaller" rear sprocket. Myself I'd go with the smaller rear sprocket because it's easy to take a link or 2 out of the chain and if you went bigger on the front you might have to grind the case saver to get the clearense and maybe need a longer chain. That turns a simple gear change into a pain in the Butt. Why do more work than ya have to for the exact same outcome This old mechanic used to tell me to just K I S S the task which stands for (K)eep (I)t (S)imple (S)tupid lol I never liked that old fart lol

83 XR500R - .040" over 11:1 piston, head machined .010", valve pockets contoured & ports opened up. Custom ground cam, racing valve springs. 145 primary & 115 secondary main jets. 15 disk 4" SuperTrapp, 14-42 gears. Front end stands up in 5th at 75mph. I love that part. LOL

xrHondaBob
Yakima, WA

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USA
21 Posts

Posted on 09/09/2007 at 09:07:05 AM  Member Profile  Reply with Quote
Wow! you can get correct and incorrect information at 4Strokes.com. Check with your local Honda mechanic or a sprocket manufacturer. If you want lower RPM at a higher speed, then larger front and smaller rear sprocket. Hopefully, your crankcase may allow one extra tooth on the front sprocket.
For the forums riders who say differently, ask the manufacturer and then edit and remove any incorrect response to this forum question. Have fun when you ride!

87 XR277 - WP suspension, 34mm Mikuni, Carrillo rod, extended head fins, ported & polished, and License Plate.
86 XL600R - SuperTrap, 122 & 118 mains with 62 slow jet, two 1" air box holes.

ptwohig
00 XR650L

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USA
19 Posts

Posted on 09/27/2007 at 10:51:57 PM  Member Profile  Reply with Quote
If you all are looking for a high performance CDI box for the 650l, I might have the awnser. On another website a guy made mention of using the cdi off of his friends 400 ex 4 wheeler. He made rthat substitution 8000 miles ago he said. Well do to emissions crap they dont make a high perfomance CDI for the L. The other night I ordered a CDI for a 400 ex that is suppose to have a better spark curve and higher rev's. It will be a couple of weeks, I will let you know how it works.

jscompto
Franklin, IN

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USA
56 Posts

Posted on 09/28/2007 at 11:28:20 AM  Member Profile  Reply with Quote
definitely let us know because they do not make a whole lot of performance mods for the 650 L. Thanks!

1996 XR650L -> 103mm piston, stainless header, cbr wheels, fcr 41 carb, underseat exhaust, 5.8 gallon acerbis tank, trailtech vapor computer, and much more
1999 CR250R -> FMF Gnarly pipe, FMF turbine core 2 silencer, twin air filter, 54T rear sprocket, great for off road riding...

Ecksarelle
Brookfield, WI

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USA
671 Posts

Posted on 09/28/2007 at 11:41:40 AM  Member Profile  Reply with Quote
Interesting!
Subscribed

06 XR650L - Stage 1 cam, Q2, desnorkle/desmog, Uni, 14/48 sprockets, black side panels & disc/fork guard.
- Donated to the support of 4Strokes.com

tikigod65
Tacoma, WA

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USA
291 Posts

Posted on 10/02/2007 at 12:38:14 PM  Member Profile  Visit tikigod65's Homepage  Reply with Quote
I changed the front sprocket on my xl from a 14 to a 15 tooth and it was a night and day difference on the highway. I can cruise at 70mph now where as before I was running it really hard to maintain 55 or 60. I still have plenty of torque for off road use though. Its a $20 part that I believe will solve your problem.

04 150 Honda Copy Quad
85 XL 600R
83 200X ATC
73 CT70
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