2021 RMZ 250 [no longer frugal build, informative thread]

Related:
Create New Tag

1/20/2021 1:47 PM
Edited Date/Time: 1/24/2021 10:20 AM

2020 was a weird year for all of us. As a 2-stroke diehard even I needed a change and decided to finally pick up a farting 4-stroke. I love 250 2-smokes but also love underpowered 125s and how they really reward you when you ride them well. I'm treating this similar and starting out with an 'underwhelming' platform and see what minor stuff I can do so I enjoy riding it more and more.

This is intended to be more informative for those interested, not a balls-out build. Wasn’t sure if this should go here or tech forum honestly.

Thought this would be nice to do for a few reasons:
1) People HATE on the bike and act like it has half the horsepower of every other 250
2) Since the RM-Z suspension comes so far off for most people in stock condition.

Day 1: Picked her up in the pale moon light.

Photo

Photo

|

1/20/2021 1:49 PM
Edited Date/Time: 1/21/2021 9:06 PM

A. There are enough videos out there to know that giving the RMZ more air will help it out. Started by trimming the airbox and the snorkels off the side panels.

Photo

|

1/20/2021 1:53 PM
Edited Date/Time: 1/21/2021 9:06 PM

B. suspension:
I could hardly move the forks in the garage, they are so stiff. I spoke with ENZO Racing and ended up picking up .46 kg/mm fork springs and 4.8 kg/mm shock spring (I weigh 148 lbs). I'm also starting off with less oil in the fork legs, 340ml.

Photo
Photo
Photo

|

1/20/2021 3:30 PM

Nice dude! Can't wait to see how it turns out and what you think of it.

|

2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

Thanks to : Factory Effex, Simi Valley Cycles, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, Mika Metals

1/20/2021 5:18 PM

Excited to see. I like seeing the “frugal” builds, caters more to my budget!

|

Unleaded tastes a little tangy. Supreme is kinda sour, and diesel tastes pretty good.

1/20/2021 10:14 PM

Nice!

One thing to keep an eye on is your wheels. I have about 20 hours on my 2020 450 and both rims are a weebln and a wobblin real bad. Flat spots and taco shells front and rear.
I usually go through a set of rims per year but these didn’t even make it 4 months.
They must be made of recycled Pepsi cans.

|

1/21/2021 6:58 AM

JWACK wrote:

Nice!

One thing to keep an eye on is your wheels. I have about 20 hours on my 2020 450 and both rims are a weebln and a ...more

Thanks dude. Their literature says they are DID dirtstars so I figured they were the same as what comes on the Huskys. I’ll keep an eye on them for sure.

|

1/21/2021 8:06 AM

Following. I like frugal.

|

1/21/2021 9:17 AM

JWACK wrote:

Nice!

One thing to keep an eye on is your wheels. I have about 20 hours on my 2020 450 and both rims are a weebln and a ...more

seth505 wrote:

Thanks dude. Their literature says they are DID dirtstars so I figured they were the same as what comes on the Huskys. I’ll ...more

That should probably have an * behind it. That reads made to suzuki's spec's. They are probably like the excel rim's that come on Yamaha's. Lighter weight lower grade alloy 6000 series vs 7000. Used on a real excel rim. Not the made to Yamaha spec's excel's. The Yamaha ones also only have one excel logo vs the two logos a real excel rim has.

Suzuki's dirt stars are probably the same thing. They are actually made by d.i.d just a lower spec because it's cheaper. Unlike ktm/husky that spec's the higher grade real versions on their bikes.

Although ktm tried to go to the cheaper excel rim back in '12 '13 and got a lot of complaints from people bending them. So they went back to using the higher grade excel. Excel must be making a lot of these lower spec rims. Because they just came out with selling an economy line called the excel ONE line of rims. And they recommend them more for the casual rider not mx'er.





|

1/21/2021 9:57 AM

Something else is in route for the banana bike 2.0 (I used to have an RM 125 that someone drew bananas on).

Photo

|

1/21/2021 10:04 AM

Yosh and Suzuki go together like bread and butter.

|

Unleaded tastes a little tangy. Supreme is kinda sour, and diesel tastes pretty good.

1/21/2021 7:06 PM

JWACK wrote:

Nice!

One thing to keep an eye on is your wheels. I have about 20 hours on my 2020 450 and both rims are a weebln and a ...more

Hey just wondering what type of riding you do? And weight? I weigh 145 and been doing desert 🌵 and Mx on my 2020 250rmz rims are still running true as when I purchased...just initially trued after a few hours... I’ve been impressed how true they have remained! I Have built hundreds of bicycle wheels usually there is a reason why they come back to shop square 🤓

|

1/21/2021 8:04 PM

sub'd to this build.

im a suzuki die hard and have mad multiple rmz250s and rm125's

|

"If you feel in control, you're not going fast enough" ~Mario Andretti

1/21/2021 9:14 PM

JWACK wrote:

Nice!

One thing to keep an eye on is your wheels. I have about 20 hours on my 2020 450 and both rims are a weebln and a ...more

biondo wrote:

Hey just wondering what type of riding you do? And weight? I weigh 145 and been doing desert and Mx on my 2020 250rmz rims ...more

I’m 155 and ride Dez and Moto.

|

1/21/2021 9:17 PM

C. Exhaust

So I spoke with Yoshimura techs the other day and they told me the rs-4 and rs-12 will see the same gains. As always, there are positives and negatives to most decisions. Staying true to the frugal form, I opted for the stainless steel rs-4 full system. I almost chose the titanium system but I opted to spend less money.

Positives:
-Same gains as more expensive rs-12 system
-scored full system for $400!
-I actually think the muffler looks better as it slims down in the rear compared to the rs-12 (just my opinion)

Negatives
-No real weight savings, was 1 ounce lighter than stock

The system install was a breeze! This thing fit like it was OEM and I appreciate that after having many issues with systems over the years. Riding tomorrow so I'll finally get to the performance of the stuff.

Photo
Photo
Photo
Photo
Photo

|

1/21/2021 11:06 PM

seth505 wrote:

C. Exhaust

So I spoke with Yoshimura techs the other day and they told me the rs-4 and rs-12 will see the same gains. As ...more

Anyway to get another one at that price ?
Thanks

|

1/22/2021 5:41 AM

seth505 wrote:

C. Exhaust

So I spoke with Yoshimura techs the other day and they told me the rs-4 and rs-12 will see the same gains. As ...more

biondo wrote:

Anyway to get another one at that price ?
Thanks

Check the Yosh website!

|

1/23/2021 9:02 AM

Awesome cant wait to see how this turns out

|

1/23/2021 10:49 AM

seth505 wrote:

C. Exhaust

So I spoke with Yoshimura techs the other day and they told me the rs-4 and rs-12 will see the same gains. As ...more

biondo wrote:

Anyway to get another one at that price ?
Thanks

seth505 wrote:

Check the Yosh website!

Hey thanks just checked website out of stock for now you must have got last one😎but left my email ...

|

1/23/2021 12:51 PM

First ride report:

Got to ride Cahuilla Creek on Friday (special opening because of crazy weather lately). The dirt was mint and the track was not very rough, yet a few jump faces got really rutted so they were tricky and causing people some grief.

Ergonomics: I'm 5'8" and this thing feels comfy right away, similar to when I jumped on a Honda 250f. Nothing feels weird, with the bars rolled back a little and levers where I want them, it is super comfortable.

Handling: Like a broken record at this point but these things have to be the most nimble bikes around, excluding 2-strokes. This thing turned like carving a knife through warm butter. On the faster straights I didn't get any unexpected twitches though the track was a little on the smooth side compared to days with a bigger crowd.

Motor: Pretty much what I expected out of it with some nice surprises. There were some rather tight corners on this track that I'd ride in 2nd on my 250sx and this thing pulled 3rd gear and barked out of them. This grunt out of turns really impressed me. The spot it felt most lacking (especially compared to my old 250sx) is a long left hander into an uphill to a finish line jump at the peak. I'd ride the corner in 3rd and then grab 4th and it would struggle a little bit up the hill to gain momentum. I'd imagine this is where some head mods or something like the package JGR was selling would really wake up that top end.

Suspension: Starting out with springs for my weight/level and 340ml oil in the forks, the suspension was still stiff prior to breaking it in. I couldn't even get to the stock starting point of 110mm rear sag on the shock because the shock spring was getting too loose. I started out with 104mm and just went and rode with all the clickers at stock positions. Bike handled very good overall. With some weird rutted jump faces I cased landings a few times and the bike packed up and still didn't use all the travel. I ended up going out 2 clicks on the compression and 1 out on the rebound and it felt more compliant. I'll have to see how that progresses as the suspenders break in.

I intended to check/set the sag again at the end of the day with my gear still on but my buddy cross rutted and got a concussion so that didn't happen. Really pumped to try the bike on another track, like the tighter/jumpier Statefair mx and see how nimble it feels in those tighter sections.


Photo

Photo

|

1/23/2021 1:24 PM

JWACK wrote:

Nice!

One thing to keep an eye on is your wheels. I have about 20 hours on my 2020 450 and both rims are a weebln and a ...more

biondo wrote:

Hey just wondering what type of riding you do? And weight? I weigh 145 and been doing desert and Mx on my 2020 250rmz rims ...more

JWACK wrote:

I’m 155 and ride Dez and Moto.

Lol!!!
Biondo, don’t let JWACK fool you. He’s a damn good/fast rider.

|

2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

Thanks to : Factory Effex, Simi Valley Cycles, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, Mika Metals

1/23/2021 3:57 PM

seth505 wrote:

First ride report:

Got to ride Cahuilla Creek on Friday (special opening because of crazy weather lately). The dirt was mint ...more

Hi Great report! Sounds like you know what you are doing! Is that 2 clicks from factory settings... I just started riding At 66 and Mx last year just started clearing jumps on vet track
I noticed my travel is almost to bottom with 4.2 springs and 325 ml oil ..did a few laps on the main track couple weeks ago trying to get over fear of jumping...having fun learning! Hope you’re friend is doing good...
I noticed they changed tracks adding some length and corners were a bit rutted out! Still trying to figure those out🤓
Anyways Great update !

|

1/23/2021 4:06 PM

biondo wrote:

Hi Great report! Sounds like you know what you are doing! Is that 2 clicks from factory settings... I just started riding At ...more

Thank you, yup that was out from factory settings. .46 fork springs and 4.8 shock spring.

|

1/23/2021 9:25 PM

seth505 wrote:

First ride report:

Got to ride Cahuilla Creek on Friday (special opening because of crazy weather lately). The dirt was mint ...more

biondo wrote:

Hi Great report! Sounds like you know what you are doing! Is that 2 clicks from factory settings... I just started riding At ...more

seth505 wrote:

Thank you, yup that was out from factory settings. .46 fork springs and 4.8 shock spring.

And here I’ve been waiting on an update of that ONE TWO FIVE LOL. I’ll be following. Glad to see you out riding bud.

|

1/23/2021 10:12 PM

Chance1216 wrote:

And here I’ve been waiting on an update of that ONE TWO FIVE LOL. I’ll be following. Glad to see you out riding bud.

I'm a failure, she's still in the garage silly

|

1/24/2021 7:54 AM

PUBLIC SERVICE ANNOUNCEMENT
Change your oil & filters laughing

Had a few shavings after break in but the surprising part was how much paint was caught in oil screens. Yellow paint, from marking internal fasteners, was clogging the screens pretty gnarly. You can also see a little metal shard in the upper right.

Photo

|

1/25/2021 10:52 AM

seth505 wrote:

PUBLIC SERVICE ANNOUNCEMENT
Change your oil & filters laughing

Had a few shavings after break in but the surprising part was ...more

Great info and build! I had those shavings on mine too, but not the yellow, and it was just in the first oil change, Luckily! Also watch out for the chain slide wearing out early and your chain cutting into the swingarm! I replaced mine with an Acerbis and am keeping a close watch on it...

|

Pin it to Win it!!
Live as if you'll die tomorrow, Take care of your body as if you'll live forever!

'19 RM-Z250
'03 YZ125
'79 RM100

2/9/2021 10:02 AM

Ride #2 notes

Rode a track that is completely different than Cahuilla (Barona mx) and noticed a few new things.

1) Suspension update: I think Enzo nailed it on spring rates for me and the bike felt really great and balanced at this track as well, no complaints.

2) Engine characteristics: Rode with the aggressive map from the wifi tuner app loaded and bike felt great overall (Side note, people commented that the bike sounded sick, so that's always a plus! grin )

One thing that this track brought out was the short comings of the top end ability to rev out. There is a long downhill at this track with a few jumps and chop. On my 250sx I would just hold 3rd gear and all was well. On the RMZ, I'd be in 4th gear and when it rev'd out, it would almost feel like I accidentally clicked into 3rd because it would drop off rather abruptly. I think I am just used to holding a gear and reving bikes out in general (I'm a 2-stroke guy inside). In hindsight, I should have experimented with grabbing 5th gear but I never did that. The bottom end/mid range is impressive on the bike but now I'd love to try and improve the top end characteristics.

|

2/9/2021 3:05 PM

seth505 wrote:

Ride #2 notes

Rode a track that is completely different than Cahuilla (Barona mx) and noticed a few new things.

1) ...more

Hey are Y’all doing Cahuilla this week?
Thanks Warren

|

2/9/2021 6:25 PM
Edited Date/Time: 2/9/2021 6:26 PM

biondo wrote:

Hey are Y’all doing Cahuilla this week?
Thanks Warren

I think I might ride statefair or perris this weekend.

|