Free CRF300L exaust mods, weight reduction and a tune!

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Making the stock 300L exhaust flow better without making it loud! we also ditch all the extra weight we can, get an accurate weight with a full tank of fuel, add a ecu tune and test it out!
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#crf300l #enduro #dualsport #honda #dirtbike #550performance

Опубликовано:

6 окт 2024

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Комментарии : 59

@kevinmcbride8446 2 года назад

If you're gonna drill holes in the spark arrestor you might as well just cut I off completely, that's what I did and it sounds really good.

@WanderingDad 2 года назад

Drilled the spark arrestor on mine. Tested using my Dynojet, it was faster 4k to 10k in 4th (only gear I tested), injector duty cycle was higher, but I got better mpg. Better flow= better efficiency, but I'm very slow so no ripping around for me.

@ChuckHolt 2 года назад

That’s awesome that you got actual data from it!

@MrBlaze256 2 года назад

On the road a windshield would make a difference. somehow I hit 90 on my 250l the other day

@ronald8673 2 года назад

HP gains come from burning more fuel, bigger explosions = less mpg. Is the cat a self contained unit ? I have a repl. ss header/alum exhaust muffler on order but might try to put the cat back in some how. Most weight comes from mild steel full frame, steel exhaust, steel handlebars, steel gas tank, steel rear sprocket, steel foot pegs, steel head lite/gauge support, steel mirror rods and emissions hardware. All other normal bike bits are alum. or required steel like brake discs, chain etc. Thanks for posting.

@ChuckHolt 2 года назад

Yep

@MotorcyclesOffroad 2 года назад

Removing the cat and drilling those holes will make the bike more hot on your leg. The whole reason it feels hot is because the bike runs super lean from the factory. When I got my ECU flashed to stage one from 550 performance, it took all the heat away. Did you feel the same from the ecu? also fyi You loose mpg with the ECU because the flash advanced your timing.

@Luckyluke141 2 года назад

I would imagine removing cat will help cool temps down because in order for a catalytic converter to work in needs to get extremely hot to change change the harmful compounds in the exhaust to safer ones. Of course a lean motor will not help with heat but throw a cat on top of that and now we’re talking a lot of heat.

@Luckyluke141 2 года назад

Also love your videos as well! Keep on keeping on!

@MotorcyclesOffroad 2 года назад

@@Luckyluke141 thank you!

@ChuckHolt 2 года назад

The mileage loss comes from the enrichment of the fuel map, the timing just adds performance based on the fact that you will only be running 91 octane. I understand the fuel enrichment is a direct trade, power for mileage, I just figured people should know what they are getting into when doing the ecu, the fact that it’s running richer makes EGTs cooler obviously, but the cat area was 60ish degrees hotter than the muffler directly after the Cat according to my temp gun, plus I figured it couldn’t hurt getting it to breathe better.

@MrBlaze256 2 года назад

The cat has to glow red hot to burn the leftover fuel. So removing it would help cool that area

@dailylife3975 Год назад

The reason why it runs hotter on your leg is because they run lean from the factory so when you do the ECU it richen it up a little bit

@ChuckHolt Год назад

Absolutely, but the heat from the cat doesn’t help things, we did the same thing to another bike and it dropped the temperature of the exhaust pipe by your leg 36 degrees when measured with a temp gun, and that bike did not have the 550 performance ecu at that time.

@phantomshtter 9 месяцев назад

No. It's the cat and the stolen airbox air that's run to the pipe to literally increase exhaust temp my dude.

@user-se7vt5ow4e 4 месяца назад

@@phantomshtterExactly. The simplest fix is just plug the hose from the air box to the pair valve. It will also stop the popping sound coming from the pair valve. Also wrapping the exhaust keeps the heat off your leg.

@Scoottoots 2 года назад

Nice. You didn't mention (I think) which ECU you installed. Was it the stock improved 87 octane, Stock improved 91 octane, or one of the stage one versions. I have the stock improved 87 octane and it has improved performance noticeably. Btw, if you're in a fire-prone area, you no longer have a functional spark arrestor with the holes drilled in the end cap. I live in a high risk wildfire area so I just drilled out that end plate completely and covered the hole with spark arrestor screen. I imagine removing the CAT did the most in freeing up the flow. Good stuff :-)

@ChuckHolt 2 года назад

I am running stock improved 91 octane, I thought about drilling bigger holes and covering it with screen, still might

@ridelikekrum7707 2 года назад

Insted of drilling small holes in the arrestor i drilled it and removed all the blocking plate and reinstalled. sounds just right for me and I picked up 6 mpg. I now avg 80.1 mpg

@ChuckHolt 2 года назад

Wow really? Nicely done

@ridelikekrum7707 2 года назад

@@ChuckHolt yep thats the only thing I changed on my 300. just by opening up the exhaust went from 74 mpg to 80+. It also gave it a little more bottom end.

@damacknificent151 Год назад

Would be nice if you did a video for us beginner's. How you did it step by step.

@OmarLopezAguirre Месяц назад

Hi buddy! Do you have to modify anything else or just drilling the holes is enough? I just want to know if this procedure will not damage my bike ! Thank you !

@ridelikekrum7707 Месяц назад

@@OmarLopezAguirre it will not hurt anything. So all you do is remove he cover on the muffler. Then remover the three bolts holding in the exhaust tip. When you remove that you will see the blocking plate inside the end of the tube. That is what i drilled out to have no restriction with the air flow.

@joeheiser4126 9 месяцев назад

How did you take the catalytic converter out of your pipe? Do you have a video of that?

@ChuckHolt 9 месяцев назад

With a long 1/2” drill bit and a big bar and hammer

@gosolobox Год назад

Looks like a Walker Valley Trials rear tire..

@ChuckHolt Год назад

Motoz mountain hybrid

@airadaimagery692 2 года назад

How much is an ECU, and what is the block off plate for?

@ChuckHolt 2 года назад

550 performance tuned ecu is $150 if I remember correctly. The block off plate blocks the port for the exhaust recirculating circuit, so I could get rid of all the emissions crap.

@olav2449 2 года назад

Anecdotal tuning by sound.

@dirtbiketommy1144 2 года назад

What's ur mpg now?

@ChuckHolt 2 года назад

Over the last 2 tanks since this stuff was done it was 68.9, this was about 20% trail 40% gravel road and 40% pavement.

@dirtbiketommy1144 2 года назад

@@ChuckHolt that's awesome I'm getting about 62 minus one tooth in the front and mainly riding around town

@t_c5266 Год назад

What was the total weight saving and cost of all this?

@ChuckHolt Год назад

I only had access to the race scales once I was done, so I wasn’t able to weigh it before, I do know it ended up at 311 with everything I added, obviously I took as much as I could off, but in my opinion a bike isn’t ready for Rocky pnw single track without a good skid plate, hand guards, and a rack for extra fuel, beer or occasionally overnight supplies. So with all that it only gained a couple pounds. As far as cost, I didn’t add it all up, a lot of it I bought way before the bike even showed up and I don’t remember.

@t_c5266 Год назад

@@ChuckHolt ahh for sure. Thanks! And I can't believe the bikes don't come with a skid plate. I have one and bought a skid plate asap. Went riding this weekend and kicked a huge rock up. It dented my skid plate and actually gouged it a little. That would have put a hole straight through the case. Also idk if I saw it or if you mentioned it. But might as well toss the 2nd rider pegs on the back lol. Useless weight unless you're always taking someone somewhere

@ChuckHolt Год назад

@@t_c5266 yep, I tossed them, the reflectors, the giant rear mud flap thing, the upper chain cover, the weighted bar ends, one mirror and the emissions crap

@mt1885 Год назад

I got the smart moto kit for the other items and will do the 550 should get bike in Jan 2023 sometime. But wanted to get rid of that and the exhaust. Can you post a link to the pair deal and is the 550 ecu no check engine light after right?

@ChuckHolt Год назад

Correct, no check engine light with the 550 ecu, I will see if I can find the pair block off again, it was on eBay

@ChuckHolt Год назад

I cannot find the pair valve block off plate anywhere for sale.

@mt1885 Год назад

@@ChuckHolt I think found it smart moto

@marcochavanne 2 года назад

Can I get a link for the plate? Google didnt pull anything up for that part number

@ChuckHolt 2 года назад

www.ebay.com/itm/224661589971?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=Sa_qteMJQ0S&sssrc=2349624&ssuid=w3YPOWoPS46&var=&widget_ver=artemis&media=COPY

@waynekelly9395 2 года назад

So is this all stuff that can be pulled out and unbolted or did you have to do some major hacking

@ChuckHolt 2 года назад

It was pretty easy, but definitely not reversible, getting rid of the cat was a little time consuming, modding the spark arrester plug was quick and easy.

@aldearadu5219 5 месяцев назад

how did u get the cat out ???

@ChuckHolt 5 месяцев назад

I used a 12” long 1/2” drill bit and a steel spike and just kept drilling and pounding and prying until I got everything out, I didn’t want to show that part on video for obvious reasons

@basilistitieh5862 8 месяцев назад

what skid plate is that?

@ChuckHolt 8 месяцев назад

Acerbis for the 250L fits perfect, all you have to do is drill 2 holes in it at the front

@Eddie_Turbo Год назад

Is it simple to remove the cat? or do you need to grind/reweld the exhaust back on?

@ChuckHolt Год назад

no, its pretty easy, i used a pry bar and and a hammer.

@jimmeyer4822 Год назад

@@ChuckHolt I want to see that video!

@jimmeyer4822 7 месяцев назад

@@ChuckHolt please tell us more! No video of that??

@ChuckHolt 7 месяцев назад

@@jimmeyer4822I would’ve but video of that would get me in hot water

@phantomshtter 9 месяцев назад

Bunch of butt dyno bologna. The 550 ECU doesn't improve felt performance. Gutting the stock exhaust definitely doesn't. If you felt any increase at all I would say it would be from the weight loss and your itchy throttle palm post mod.

@ChuckHolt 9 месяцев назад

Gutting the exhaust wasn’t aimed at gaining performance, it was done to keep the leg heat down, and it didn’t that by a lot. As for the 550 ecu it was literally night and day difference, in fact we rode my 300l with the 550 ecu and my brother in laws back to back and we both noticed a huge improvement. And judging by how lean it was from the factory I don’t see how it couldn’t be, peak performance isn’t at 15.6:1.