Honda Monkey 125 Chain and Sprocket Upgrade | Installing a 37T Rear and DID Gold Chain
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- čas přidán 7. 09. 2024
- #monkey125 #hondamonkey #monkeybike
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For the longest time I've run the 14T front and 36T rear sprocket, and while that's been fine, I really love the 14/37 combo I have on my Grom with almost identical mods, so I've decided to try that on my Monkey to see if it's as good.
Here's the parts I used in this video and where I got them. IF YOU SHOP AT BROCK's PERFORMANCE, USE THE COUPON CODE "JOHN5XR" AT CHECKOUT FOR 5% OFF ANYTHING!
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The 36T Vortex Rear Sprocket I removed:
bit.ly/3yd3jZ1
JT 37T rear sprocket for Monkey/Grom:
amzn.to/3dv0o6f
JT 14T front sprocket for Monkey/Grom:
bit.ly/3jz7cUb
or if not in stock:
amzn.to/3dv163p
D.I.D. 420 NZ3 Super Non O-Ring Chain - 100 Links - Gold
amzn.to/3qz7oV2
Motion Pro Chain Tension Tool Slack Setter Pro 08-0674
amzn.to/3y9UnUt
Great video - thanks very much. Made my replacement sprockets and chain a breeze to do!
Ya dont need to take off the front sprocket guard. Use a piece of mechanics wire from the old to new chain and pull it through.
I'm a big guy, 6ft 3 270 and my wife weighs 180. I switched to 14 and 37 tooth sprockets along with mobbed tires and it's perfect for dirt , trail riding. Also now when we do go on the roads it evened the top speed on both bikes even with the weight difference we both get about 55 mph. That's good enough for the amount of riding on the road we do and it's nice to have the bikes equalized.
Interesting info, thanks for sharing!
Ahhh got it thanks
I've been wanting to do this! Thanks for this video👍🏻
Definitely worth it!
14t front 37t rear on my OG Grom, first gear is short, top speed is 58mph or so on the limiter lol (I'm 145lbs, Kitaco clutch cover, intake, exhaust and tune) acceleration overall is fantastic and wheelies are easier to get up.
Interesting, I have the same setup on my Grom and loved it so much I put it on the monkey. So far I topped out at 67 with my mods, and the knobby tires, so I’m pretty happy with that!
Chains should be replaced before they reach 102% of their original length. Probably why your 98 links are the same length as the 100 link. Works out at about 2%.
Makes sense now
Great production. Best camera / lighting yet. That cliffhanger though - will he hit that rev limiter in high gear?
Thanks, I appreciate that! Still didn’t hit the rev limiter, but really really close!
I did this to mine and now it goes 65-70 mph.
Nice. The 3:20 min mark is always the start of my personal hell. Any idea what the real value of that free floating "c" shaped piece on the front sprocket cover is? What if I dont put it on? Thx
That's a chain guard to ensure a broken chain or jumped chain doesn't crack your engine case. Super important in my opinion!
Another great video John, thanks. Are you on the Honda Monkey 125 Owners group on FB?
Thanks for watching and the comment! Yes, Facebook name is John Adamczyk
NIce. I just did the same thing because of you! Did you leave the sticky stuff packed on the did chain or did you clean it and relube? Many thanks.
Cleaned and re-lubed
Where's the link for the rear/ front socket and chain?
What its called that tool to measure the clearance ? thanks
Can you do a video removing and re installing the bearings on the rear wheel?
Probably not in my near future as I’ve already gone though that with having the wheels powdercoated and am not too keen to tear it all apart again!
@@John5XR I gotta install bearings again since the last ones got destroyed. Not sure i fI need a new rim
@@John5XR I got my new bearings in yesterday and found out I need to buy a new brake caliper and stuff since it got bent as the bearings died. Also just discovered my front tire has the same exact leak on the side of the tire valve now and had no air when I checked it. IS that a common thing to fail? I am gonna just buy a tube and do it myself no matter how long it takes. So my last trip to the shop is costing me hundreds and headaches. Literally got destroyed after leaving the shop. I should have left the tire repair for myself when I got a chance.
Can you put a link where you purchase the sprocket from?
Absolutely! I’ll put this in the video description as well:
amzn.to/3PFDZU4
amzn.to/3AH8YLe
amzn.to/3wt4S6K
This is kind da of an upgrade but..the real upgrade is going from 420 sprockets and chain to a 428 sprockets and chain...that's what I did.. much stronger.
Wouldn’t that heavier being wider? I don’t wanna ask more of my 10hp to try and spin! I don’t think I need anything stronger either, not much power going through these.
@@John5XR To your point, I agree that we're not at risk of breaking a 420 chain with 12 hp. For sure, the 428 will be heavier, though I've read that it's not a big difference if going with a good X-ring chain vs. an O-ring chain. A 428 chain will not stretch nearly as much as the stock 420 size. My stock chain has stretched like crazy unlike all my other bikes that rarely need adjusting. You're probably in the same boat looking at how your new chain and old chain are about the same length. I am going to go with a 428 with my replacement so I'm adjusting the chain less. Honda uses a 428 on the CRF125. Laziness generally wins.
Good points, the stock chain does seem to stretch fairly easily
Haven’t messed with my sprockets yet. I have the yoshi rs3, MNNTHBX intake and DHM flash. I still feel there’s more top end available. What’s your top speed with the sprocket mods?
I topped out at 67mph after the sprockets. I’ve had them on my Grom for a long time and topped out at 67 on that too, but don’t have the high compression piston on that bike.
@@John5XR Another interesting thing is the shorter gearing from your Mobbers. They're 130/70 vs 130/80 of the stock tires. That's good for a 5% bump alone. The 37t over the 36t is only a 2.6% bump.
I already have a 14t front and am now waffling between the 36t an 37t for the rear on stock-sized tires. I have intake/exhaust/cam/ECU flash and we're about the same size. Was leaning to 36t but am now considering 37t after seeing your results.
Go 37! I have the 14/37 on my Grom with all the same mods but the high compression piston, and ran the stock monkey tires on it and it pulled 67mph as well.
@@John5XR I installed the 14/37 on my Monkey last weekend. I loved it so much that I ordered the 12 o’clock speedo corrector. Installed that tonight and she is dialed right in! Thanks so much for your videos. They make all these mods so much easier!
Glad to hear this! I felt a major difference between the 14/36 and 14/37 and think the 37 is definitely the way to go. Enjoy!
So you don’t have to rivet the chain? Also did you leave it at 100 links or take two off?
I bought it to exact link size, but you can remove a link or two if needed as there’s a master link
What tooth count have you got onfrt/ rear now, is it for pull or top end. Thanks John
I'm running the 14/37 combo and it's great for low-mid range pull. For top end, stay with the stock ratios
Loctite 242
no need when you have an ugga-dugga gun