How To: Dave's Mod on XR650L [4 Minutes]
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- เผยแพร่เมื่อ 21 ม.ค. 2020
- This is a basic mod that helps throttle response significantly! In addition to Dave's Mod many other people also buy a UNI air filter, install a new exhaust, and desnorkel their bike. In total this cost me $14 rather than the dynojet kits which are significantly more $$$. In my case, I have a UNI air filter and bought an XR's Only Header & Exhaust following this mod I did. If you have any questions- put them in the comments below, and I'll be glad to answer them! Thank you again for all your support.
Written Guide Link:
www.jetsrus.com/FAQs/FAQ_jett...
Where to buy Jets:
www.jetsrus.com/a_jet_kit_dir...
Needle Shim:
#4 Washer from Home Depot is what I used - ยานยนต์และพาหนะ
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Timestamps:
Remove Float Bowl: 0:11
Remove Jets: 0:30
Remove Pilot Screw: 0:54
Remove tab from Pilot Screw: 1:02
Remove Carb Top Cover: 1:31
Remove Spring & Slide: 1:58
Remove Needle Holder & Needle: 2:03
Drilling Slide: 2:14
Shim Needle: 2:28
By far the most informative Dave's mod video I've seen. Really appreciate the video guy!
I appreciate it 😂. No one else had made a clear one so I had to fix that lol
This was super helpful. A great supplement to the written instructions that come with the FMF jet kit, which assume a base level of carburetor knowledge that I don’t (didn’t) have. Thanks again!
Glad to hear it helped you! 🙂 And you're welcome 🙂
Great videos dude! Thanks for posting
You're welcome!
I wish I saw this video, before I ordered the dyno jet kit, but im happy that I did see it because it will help me when I pull my carb off to rejet it.
I do hope it helps! Thanks for watching :)
Good job explaining.....this is one of the first things I did on my bike. Thanks for the video.
You're welcome! 🙂 It's definitely one of the best mods to do on the XR650 alongside the improved front sprocket
Just got my front sprocket, im thinking ill do the jets at the same time,thanks
@@davebuchanan9761 glad to hear that! If you have any questions or issues along either upgrade I'd be glad to assist as much as I can! 🙂
Wow this helps so much , thanks for make easier to understand
You're welcome; I'm glad it helped you! :)
Just did mine, wow the responsiveness is so much better!!! Thanks for making this video and making it easy for me
Exhaust Mod
After doing Dave’s Mods take out the Baffle out of the tip of the Pipe,Cut it down to 3” and reinsert it. Also remove the lower exhaust plate on the bottom of the tip.Its the same as buying a expensive aftermarket loud pipe. I like the stock look .
Thanks for this video! I have an exhaust, jets, and air filter on the way. This will be a great reference when I start pulling things apart. Lol
Awesome! Also, thanks for watching! Which exhaust did you decide to go with? 🙂
@@one_terrabike3151 I went with the Yoshimura RS-2.
@@one_terrabike3151 Do you have any recommendations on tires for the 650L? I just started looking / researching for a set both dirt and street capable. Thanks
Be sure to check this video out before doing the Dave's mod to see some more info about why it's done and some precautions to save you time! :
th-cam.com/video/IkyA4V6zGcY/w-d-xo.html
I did this carb mod to my 08 BRP. I also added an FMF pipe (retained factory header), removed smog pump and replaced w/ baja smog kit, changed out front sprocket from 15 to a thicker 14 teeth..and the difference is very noticeable...it went from being a Japanese sewing machine to being a real 650! After getting it back together from carb mod and sprocket swap, within first minute of test ride I gave her a little to much welly, and spun the back tire on the rim effectively shearing off the valve stem, so be careful of that...and of front wheel wanting to come up while accelerating into a leaning turn! That bike is a monster. I love it!
Glad to hear your bike RIPS XD... but be careful yourself as well and ride on :)
Going to a 14, how did that change the top end?
great video :-)
I appreciate it! Thanks for watching!
Just did this along with a uni filter and slip on DG RST exhaust. 55/160 jetting. Holy crap what a difference
glad to hear that!
I'm just going to go ahead and like. I'm also gonna go ahead and subscribe. I'm just going to go ahead and try out these mods. And then I'll go ahead and leave you a review.
Sounds good to me! :)
Very good video. Any ideas for jets in Colorado?
What is the purpose of drilling the 5/32 holes ? Little hesitant on that .
What exactly is the benefit I’ve read from countless people to do this but no one ever really says why, either way good video I subscribed because I’ll need other videos, keep up what you’re doing
It's really as simple as it lets the bike run cooler, throttle response is improved, and cold starts are much easier.
Hi all, what size drill (mm)you used for those two holes, and what thickness of washer you put under the needle, thanks
Hi ONE_Terrabike, I have a xr600r, that has the 650 carb, just did the mod, (awesome instructions) first question, why is the shim required? And second would those jets work with the 600 engine?
On another note what oil would you also recommend? In Queensland Australia hot summers and warm winters low of 10celcius. I put 15-40 high quality diesel oil in and after 100k’s it’s started backfiring and stalling. That’s why I did Dave’s mod.
Pulled this from the internet: Shimming the needles will get rid of a nasty lean spot coming right off idle. If your bike stalls, hesitates, hacks or coughs when you are trying to pull off from a stop, you could use shimming. Next off: I admittedly know little about the XR600 besides the fact that it's very similar to the NX650 and XR650L... simply search 'XR600 jets' and look around! 🙂 As for oil I just started to run 10w-40 Motul 7100 and I'm in GA where it's been fine at 93° F (~33.9° C)... I run synthetic as it's MUCH more resistant to high heat where it won't break down as fast and also permits easier shifting. As for the stalling... Check your valve clearances as those might be off spec 😁
Where did you find the info on drilling out the plug for the fuel mixture screw?
Older XR's like my 06 do not have a plug, but simply look up "How to remove a welch plug on a motorcycle" and you'll be in good shape :)
hello. I have a question..would you recommend re-jetting with the installation of a FMF power core 4 slip-on (onto stock header)? Please, and thank you. Have a great day!
Sorry for the minor delay in my response-- Yes, I would rejet it still as you're using an exhaust with much less restriction than the stock one. If it means anything to you - by rejetting you're allowing more gas to the system which will also help with cooling thus improving engine longevity.
@@one_terrabike3151 Thank you! Have a great day.
Excellent video. But I live at 6700’, so a 52 pilot and a 155 main with 1-1/4 turns out on the fuel screw are all I needed after removing the baffle and adding a TwinAir filter (stock pipe 2014 XR650L). Do NOT shim the needle or drill the slide! Cheers!
Thanks! :) I hope this helps other people at the similar elevation!
ONE_ TerraBike no worries! Hard to think clearly up here in the thin air lol
I live at 6500ft. I have removed the snorkel, K&N filter and have a full big gun exhaust and header. What would you suggest for main and pilot jet?
@@jdfording1 Start with my settings and go from there. You may need a larger main jet with that pipe. I sold my bike and got an injected side by side. No more jetting issues!
@@ark6959 Thanks. I switched to a uni filter and went 55/155 and the bike pops real bad on decel. I'm thinking a 52/158 might fix it. I have not shimmed the needle or drilled the slide yet. Would a larger main jet be a higher number or lower? IE...is a 158 larger than a 155?
Hey, thanks for the video! gonna do this to my bike this weekend! I have a question though. What did you mean at the end about aftermarket exhaust and running the bike with incorrect jetting? I've desmogged my bike and added the uni air filter, but want to keep the stock exhaust. will rejetting and doing the Dave mod without changing the exhaust damage my engine?
To keep it simple 55/158 jetting is the 'standard' with even a stock exhaust. Over the months with my aftermarket system I switched to 55/160 and that's right for my bike. Now, what you should worry about is making sure you oil your UNI Air Filter 👌...foam filters need air filter oil to work as designed. Thanks for watching!
Awesome! thanks man! I really appreciate the reply! have a great day!
@@gregorycam66 You too! :)
I did this exact, and added 55/158 jets. Idk what I did but now it won’t idle unless I have the throttle open. Reviewed this and the written instructions. Idk what to do from here. Maybe I didn’t shim it correctly? I’m not sure. Any advice would love!
Double check to make sure the boots are on the carburetor fully in case your issue is an intake leak, as far as your concern with the shim- it's just a washer, so I doubt you messed it up. In order to lean out your bike take off your side cover to see if your bike starts easier- let me know! (Note: I respond better on my Instagram @oneterrabike as I get notifications there!)
What jets do you recommend for a stock bike with uni filter and de smog at sea level to 2000 ft
If you have an exhaust try 55/158, but if not try 52/155
Is my brother all Honda models the same carburetor,Same as this fuel pump . Is it easy to maintain a Honda 650 motorcycle? What is the difference between a single cylinder 650 cylinder and the difference between two cylinders like Africa Tawan
It's very easy to maintain a Honda XR650L in my opinion. There are very few electronics so diagnosis can usually be done yourself 😁. However, not every honda model uses the same carburetor. The one on the Honda XR650L is a CV Carb which is better 'all around' than a lot of other carbs such as a pumper carb which simply has significantly better throttle response. As for differences between a single cylinder and twin cylinders: the single is known for lots of torque and low end power at the expense of having more vibration where the parallel is usually more consistent throughout it's power (a lot less bottom end power) but is much smoother while riding. May I ask how you plan to ride?
I want to do a slip on fmf, smog delete and snorkel delete but leave factory filter. What jets? my bike will always be around 1k ft above. Thank you!!!!
The snorkel delete won't have much benefit with the stock air filter, but I'd definitely try the standard 55/158 considering you're getting a new exhaust. However considering that might be a tad too rich at speed consider grabbing a 155 too just in case 😁. So buy a 55, 155, and 158 😎
Don't cut the tab off of the idle mixture screw, cut the piece on the float bowl that it bumps into instead. The written version of Dave's Mod makes that clear.
It honestly makes no difference to my knowledge. 15-16k miles later and it's brought me no problems grinding off the tab where I did. Looking back I see the benefit of that method (easier to turn by your hand), but honestly the engine would be so hot around there that I don't want to stick my hand there to do an adjustment 😂. I bought a FTB extended mixture screw if I want to do that. However, I found myself never needing to adjust the screw whether I was at sea level or 6k feet above that. Just my opinion though from my experiences! Take care & thank you for watching!
@@one_terrabike3151 Good point. I haven't touched mine for about ten years either. Mine is happy from sea level to above 9000 feet, by the way. It's just easier to count off 2 1/4 turns with the tab still on there.
Thanks for making this video.
@@scottnelson1713 see that point also makes sense! And of course you're welcome! 🙂
OK so I just did this and when I shim the needle it cocks the needle to the side a little. Is there a trick to getting the needle to stay straight? Seems like it may wear like this over time.
Send me a picture of it to my email oneterrabike@gmail.com
@@one_terrabike3151 does the needle washer need to be snug onto needle. ,Dave'smod
What is the purpose of drilling the slide? It would be nice if that could be avoided as the bike cannot be returned to stock without buying a new slide ($85) at that point.
"Drilling the slide lift-holes allows the vacuum to have a greater and quicker effect on the lifting of the slide. This will increase the responsiveness of the slide and therefore increase air-flow to the intake. This is usually necessary to match the increase in fuel delivery allowed by the new needle and main jet." (KZRider.com)
My Advice: Try it with just the other parts of the Dave's Mod first and if it doesn't seem very nice...then consider drilling.
@@one_terrabike3151 not greater, just quicker.
Hi man thanks a lot for your explanation, did you use 55/158 Jets ? Or which ones ?
Absolutely! The 55/158 jets were perfect! I live around 1000ft above sea level and go up to ~5/6k ft frequently and it works great there too! (Do keep in mind other mods such as desnorkeling and new exhaust though 👌)
ONE_ TerraBike Definitely i just got big gun evoR header and pipe and i already have done desnorkeling as you show on your videos!! Thanks a lot!!! I'll be waiting for more videos...
How are is that exhaust? It initially caught my attention, but I preferred the style of the XR's Only Supertrapp and header more. Also, if you have any suggestions or anything breaks on your bike you don't know how to fix just let me know and I'll do my best to make a video 😁
ONE_ TerraBike hey bud, I have an fmf header and dg muffler and my bike has the emissions delete. What jets would you recommend at sea level? Also the xrs only full exhaust was great on my XR600 but I didn’t have the supertrapp muffler, I had the regular style. Wish I still had that bike!
@@wrf8245 I'd honestly run the 55/158 setup still as I've had my bike at sea level with the mod, and it still ran AWESOME! However, you didn't mention if you desnorkeled yours or if you're using a UNI air filter which both play a huge part in my recommendation :) -- Keep me updated on your decisions and how you like it!
What size jets for sea level?
stock exhaust 55/158 but aftermarket can change that. I run 55/160 and its a tad lean still but considering I ride to higher elevations frequently that's fine in my case. Thanks for watching!
Gotta say man I did DG Exhaust and a UNI air filter and it tries to throw me off. I don’t think this is necessary.
dave's mod isn't for everyone. I'd recommend checking your spark plug to make sure it's color isnt white/black but if its looking normal & you're happy...keep sending it! :) Thanks for watching!
Also I have a 2018 XR650 FMF slip on,Uni filter and it has been de-smoged What jets do you suggest?
Lately what elevation are you at?
@@one_terrabike3151 sea level!
Definitely 55/158! 🙂
@@one_terrabike3151 awesome thx
@@one_terrabike3151 What would you use in Western South and North Carolina???
Thank you so much for your videos! I dont have a 650l just yet, but I plan on trading one of my street bikes for one. Could you just rejet the carb without doing the step at 2:19 (drilling)? I am probably going to buy new and I am curious if some of these methods will void warranty. Subbed, thanks again.
Rejetting the carburetor is simply changing the main/slow jet, so yes it's possible (you could easily start there). However, the 'Dave's Mod' calls for it to be drilled so that couldn't be completed without it being drilled (that I could understand voiding a warranty). Also, really try to buy used if at all possible-- just buy a low milage one! I bought mine with 600 miles for a little over 4k USD (MSRP runs for ~7k I do believe). Just check the countershaft splines as the factory front sprocket will destroy it if it's left in for a few thousand miles (I've heard ~6-8k miles ppl had noticed it if they didn't get the improved one)
And you're welcome! 🙂 (I really make these videos for people like you which hear about the XR and this topic comes up first and worries people 😂) So, if you have any questions or concerns about the XR- I'd love to be able to help more 🙂
I am in quarantine studying these videos again 😆, I have a question. So if you do Dave's mod, you have to get a after market exhaust? Also, not related to the Carb, but if I replaced the front sprocket with aftermarket, can I use the stock chain?
Привет ,для чего зделал эти дви фрсунки побольше ?
Это позволяет больше топлива в систему, а значит, она будет работать богаче. Honda заставила XR650L работать бережливо с завода, чтобы соответствовать стандартам выбросов.
@@one_terrabike3151 расход топливо 180/170ml за 22L ,где проблема ?
Nice job but on my 2018 XR650L I don't have a mixure screw like that!
I believe yours has a plug on it which may need removed. Is that right?
@@one_terrabike3151 Yes i already drilled it out.
@@patriotsleepercell4060 awesome! What else is different?
@@one_terrabike3151 It is the same except that the mixture screw is plugged and it is a pain in the butt to drill it out and cut of about 1/4 inch of that tube.
Okay, I did some research and found you don't need to cut the tube around the plug (If I read it right)-- rather you'll need a D-Shaped Mixture Tool
I think I would try to figure out how to replace that toilet tank Keihin piece of garbage with a proper direct pull slide Mikuni carb.
It's fairly simple as I'm sure you're aware, but unfortunately not everyone can afford a new carburetor 😔. A $13 mod that'll make some improvement and save their piston from excessive heat though is indeed worth it. It's not for everyone and ideally your recommendation is superior. Thanks for watching! 😁
Who is Dave?
Dave is a guy found throughout XR forums who basically does/did EVERYTHING on the XR650L as far as mods goes to make it run better and this was one of the things on his list that people have done for year now! Thanks for watching! 🙂
daves not here
@@mrwascallyt9865 youngsters won't get this amazing reference
Who's dave?
1 I would suggest this pouring upgrade mod whatever you want to call it change your gearing that would be your sprockets 14 in the front 47 in the rear I double my gas mileage dropped my RPMs at 60 miles an hour down to 1800
Per gearing commander that setup at 59.4mph would be 4200 rpm. That isn't bad. Stock gearing is 15/45 so at that same RPM of 4200, it'd go 66.5mph. You might be mistaking a number somewhere but your math unfortunately doesn't add up so far. Also, I'm slightly doubtful about your gas milage. Unless you were getting 20-25 mpg before and now it's 40-50 it's simply unrealistic. Anyways, to answer your first question Dave is just the name attached to this mod. No clue who he is but that's what all 650L owners know this mod by. (Use gearingcommander.com for your own research -- it has preloaded info for the XR650L)
Thanks for replying I will enjoy this. 15 45 gearing 15 divided by 45 equals 0.3 now my back tire is turning one time while the front sprocket turns three times to keep up with the back tire. Now 14 / 47 is 0.29 my back tire is spinning one time turn 2.9 times for every rotation of the back tire there's your gas mileage I was getting 40 miles to the gallon with one tank on the XR650L I am now getting 65 to 70
Now we all know we don't have an RPM gauge on the damn bike at least I don't I'm just telling you what I could feel it was a difference for the better
@@williamchauncey8100 70mpg? uhuh.
What are you Credentials for making this video?
I don't quite understand your question, so if you wouldn't mind rewording it- I'd be glad to help or answer 🙂
@@one_terrabike3151 He wants you to say that you are a certified factory trained tech., i think.
lol
Credentials = experience +success in this case I'd say
Jeez - what is wrong with the audio? Sounds terrible
You've just watched a video with audio recordings from a cell phone 😂. Even I regret the audio lol. I intend to take the video sometime, remove the audio, and reupload it with the fixed audio. Sorry about that 😔. However, most of my newer videos should be alright! Let me know otherwise
As promised... The revised video is now out on my channel 😁
Living here in the 21st Century,i have no idea(on a metric bike) what 5/32ths is...cant the Yanks just accept the World has moved on?
What’s so difficult about measuring the last section of a long dead Kings index finger, dividing it into 32 sections and counting out 5 of them? Seems silly the first few times but you’ll get used to it.