Sprocket question..

Plump Kibbles · 07-05-2021, 08:35 PM

So my rear sprocket is wanting to loosen up on me - only four bolts on my X-Pro DLX / Orion RXB250. The book states 19ftlbs when alllll the rest of the manuals for the Hawks and others are much, much higher... I'm just wondering if I should up the torque??

I do NOT have a snap ring on the sprocket.. the sprocket is just attached with 4 bolts. I have applied some Loctite 242 blue the last time I noticed that one of the bolts was almost, like within a few millimeters of hitting the swing arm.. Had I not turned around when I did; may not be writing this now!

I'm seeing around 35-40ftlbs for bolt torque, not 19.. Also wondering if anyone with the RXB's could share their torque specs for the rear sprocket just for comparison.

I did look through the resources but I don't think this one is the same for the Hawk fix. There is no play with the sprocket when the bolts are tight either; it's all like it should be when tight. But this happens maybe around 250mi? I have thought about changing out rims because these are just.. meh, but didn't know size or anything to get for my bike...

Anything would help! Most definitely some torque info for others rear sprocket spec.

Thanks!

Plump Kibbles · 07-05-2021, 10:01 PM

Okay - thoughts..

I'm thinking about taking one of the bolts from the rear sprocket to the local Ace, size it up but get a longer bolt, but not too long - grab some lock nuts, and secure it like that.. the hub does have the threads and goes through the whole hub piece.. There wouldn't be any interference in the bolt flowing through the hub whatsoever.. and from inside won't be touching anything or in danger of spinning and catching on anything....

As long as I'm alright with distance, that SHOULD provide a fix.. and not come loose. Hopefully. But - I would like to run this idea by some of the vets of the Chinese bike world to see if this is even acceptable for a fix. The front sprocket bolts are good - same torque that I had them on when installed. The rear just, doesn't need to be coming loose like that..

This is the only thing I can come up with without over-torquing the crap out of the rear bolts and stripping the hub...

herbie · 07-06-2021, 05:35 AM

I just looked up torque specs for my Honda XR250 and it is 27-33 ft lbs. My rear sprocket attaches with 5 bolts with nuts, I will check the bolt size when I get home.

Megadan · 07-06-2021, 02:57 PM

Hawk/Brozz etc. use sprocket studs for the cush drive and the sproket is retained by a snap ring. That is why the torque spec is 30-35ft-lbs. I would not use those figures on your bike unless somebody else can confirm they have used them without issue.

The longer bolts is a good idea as the more threads are engaged, the better. Loctite is also a good idea, just make sure to clean the thread surfaces before use. Any oil, grease, or even old loctite will reduce its effectiveness. Brake parts cleaner/carb cleaner isopropyl alcohol, or some other form of degreaser will do fine. Heck, dawn dish soap and a brush works too lol. The lock washer is also not a bad idea, and I have used those with loctite just to be double sure on some fasteners. Maybe it's overkill, but overkill beats death every single time.

herbie · 07-06-2021, 06:36 PM

I think I misunderstood, after rereading, I would not exceed the OEM rated 19 ft lbs either. If you're screwing the bolt into an aluminum hub I would think at about the 25 ft lb range you would probably have stripped threads or close to it. The longer bolt and nut makes good since to me if there are no clearance issues. I'm glad Dan jumped in there before something bad happened

Plump Kibbles · 07-07-2021, 07:21 AM

AWESOME! Thanks guys - was kind of scratching my head on why this rear sprocket keeps loosening up lol

I'm going to keep it at 19 - well, 20ftlbs; my torque wrench doesn't go down to 19ftlbs! I had went to 20ftlbs last time I tightened it up, had to go to 20.... but no strips, nothing that would scream out 'UNSAFE' to me.

So yeah, I'm gonna' just grab some lock nuts and some longer bolts to get this thing tight.

MegaDan - that makes perfect sense about the snap ring and higher bolt torque; went right over that fact.

Will be visiting Ace soon to get the right stuff.

buzz · 07-08-2021, 02:02 PM

Thanks Megadan

Plump Kibbles · 07-08-2021, 07:33 PM

Got my new bolts / lock nuts; got 'em on without any problems!

Going to take it out for a spin sometime to make sure it's locked in nice 'n tight; recheck the torque around 75 - 100mi.

I'll post back my results after I get some time to ride.

BTW any suggestions for filter oil? I have some 90Wt. oil, was reading any heavy oil can be used to reapply the oil coating for the filter.

Thanks again, MegaDan and Herbie!

J4Fun · Today, 04:57 PM

Quote:

Originally Posted by Megadan

Hawk/Brozz etc. use sprocket studs for the cush drive and the sproket is retained by a snap ring. That is why the torque spec is 30-35ft-lbs. I would not use those figures on your bike unless somebody else can confirm they have used them without issue.

The longer bolts is a good idea as the more threads are engaged, the better. Loctite is also a good idea, just make sure to clean the thread surfaces before use. Any oil, grease, or even old loctite will reduce its effectiveness. Brake parts cleaner/carb cleaner isopropyl alcohol, or some other form of degreaser will do fine. Heck, dawn dish soap and a brush works too lol. The lock washer is also not a bad idea, and I have used those with loctite just to be double sure on some fasteners. Maybe it's overkill, but overkill beats death every single time.

I know an old post but I’m changing the sprockets on my Hawk DLX today. I noticed folks using heat to help loosen the nuts on the rear because of the red locktite. That seems like it could damage the Cush material? I had my wife squeeze the front brake and step on the rear while I used a breaker bar and the 14 mm 6 point socket to break them free. They were on super tight. Just a thought here and Dans post makes good since. I also think that chain tension has lots to do with the sprocket bolt problems. Just posting my thoughts as I’m doing this now…

07-05-2021, 08:35 PM	#1
Plump Kibbles Join Date: Sep 2020 Location: Virginia Posts: 233	Sprocket question.. So my rear sprocket is wanting to loosen up on me - only four bolts on my X-Pro DLX / Orion RXB250. The book states 19ftlbs when alllll the rest of the manuals for the Hawks and others are much, much higher... I'm just wondering if I should up the torque?? I do NOT have a snap ring on the sprocket.. the sprocket is just attached with 4 bolts. I have applied some Loctite 242 blue the last time I noticed that one of the bolts was almost, like within a few millimeters of hitting the swing arm.. Had I not turned around when I did; may not be writing this now! I'm seeing around 35-40ftlbs for bolt torque, not 19.. Also wondering if anyone with the RXB's could share their torque specs for the rear sprocket just for comparison. I did look through the resources but I don't think this one is the same for the Hawk fix. There is no play with the sprocket when the bolts are tight either; it's all like it should be when tight. But this happens maybe around 250mi? I have thought about changing out rims because these are just.. meh, but didn't know size or anything to get for my bike... Anything would help! Most definitely some torque info for others rear sprocket spec. Thanks! __________________ \|2020 X-Pro Titan DLX\| <-- FOR SALE!!
	0

07-05-2021, 10:01 PM	#2
Plump Kibbles Join Date: Sep 2020 Location: Virginia Posts: 233	Okay - thoughts.. I'm thinking about taking one of the bolts from the rear sprocket to the local Ace, size it up but get a longer bolt, but not too long - grab some lock nuts, and secure it like that.. the hub does have the threads and goes through the whole hub piece.. There wouldn't be any interference in the bolt flowing through the hub whatsoever.. and from inside won't be touching anything or in danger of spinning and catching on anything.... As long as I'm alright with distance, that SHOULD provide a fix.. and not come loose. Hopefully. But - I would like to run this idea by some of the vets of the Chinese bike world to see if this is even acceptable for a fix. The front sprocket bolts are good - same torque that I had them on when installed. The rear just, doesn't need to be coming loose like that.. This is the only thing I can come up with without over-torquing the crap out of the rear bolts and stripping the hub... __________________ \|2020 X-Pro Titan DLX\| <-- FOR SALE!!
	0

07-06-2021, 05:35 AM	#3
herbie Join Date: May 2019 Location: Illinois Posts: 864	I just looked up torque specs for my Honda XR250 and it is 27-33 ft lbs. My rear sprocket attaches with 5 bolts with nuts, I will check the bolt size when I get home. __________________ 2022 Venom KPR 200 Red- the fastest color 16t and 46t sprockets, NGK Iridium CPR8EAIX-9, aftermarket full exhaust system. Top speed 81GPS 2023 Venom SS3 KP mini 150– Nibbi carb, Nibbi air filter, aftermarket muffler, decat 2022 Venom Ghost chopper 250 1997 Honda GL1500 Goldwing 1978 Kawasaki KL250 https://youtube.com/@herbiesgarage681 Last edited by herbie; 07-06-2021 at 02:19 PM.
	0

07-06-2021, 02:57 PM	#4
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 7,997	Hawk/Brozz etc. use sprocket studs for the cush drive and the sproket is retained by a snap ring. That is why the torque spec is 30-35ft-lbs. I would not use those figures on your bike unless somebody else can confirm they have used them without issue. The longer bolts is a good idea as the more threads are engaged, the better. Loctite is also a good idea, just make sure to clean the thread surfaces before use. Any oil, grease, or even old loctite will reduce its effectiveness. Brake parts cleaner/carb cleaner isopropyl alcohol, or some other form of degreaser will do fine. Heck, dawn dish soap and a brush works too lol. The lock washer is also not a bad idea, and I have used those with loctite just to be double sure on some fasteners. Maybe it's overkill, but overkill beats death every single time. __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124
	3

07-06-2021, 06:36 PM	#5
herbie Join Date: May 2019 Location: Illinois Posts: 864	I think I misunderstood, after rereading, I would not exceed the OEM rated 19 ft lbs either. If you're screwing the bolt into an aluminum hub I would think at about the 25 ft lb range you would probably have stripped threads or close to it. The longer bolt and nut makes good since to me if there are no clearance issues. I'm glad Dan jumped in there before something bad happened __________________ 2022 Venom KPR 200 Red- the fastest color 16t and 46t sprockets, NGK Iridium CPR8EAIX-9, aftermarket full exhaust system. Top speed 81GPS 2023 Venom SS3 KP mini 150– Nibbi carb, Nibbi air filter, aftermarket muffler, decat 2022 Venom Ghost chopper 250 1997 Honda GL1500 Goldwing 1978 Kawasaki KL250 https://youtube.com/@herbiesgarage681
	2

07-07-2021, 07:21 AM	#6
Plump Kibbles Join Date: Sep 2020 Location: Virginia Posts: 233	AWESOME! Thanks guys - was kind of scratching my head on why this rear sprocket keeps loosening up lol I'm going to keep it at 19 - well, 20ftlbs; my torque wrench doesn't go down to 19ftlbs! I had went to 20ftlbs last time I tightened it up, had to go to 20.... but no strips, nothing that would scream out 'UNSAFE' to me. So yeah, I'm gonna' just grab some lock nuts and some longer bolts to get this thing tight. MegaDan - that makes perfect sense about the snap ring and higher bolt torque; went right over that fact. Will be visiting Ace soon to get the right stuff. __________________ \|2020 X-Pro Titan DLX\| <-- FOR SALE!!
	1

07-08-2021, 02:02 PM	#7
buzz Join Date: Dec 2020 Location: Dayton Pa. Posts: 862	Thanks Megadan
	0

07-08-2021, 07:33 PM	#8
Plump Kibbles Join Date: Sep 2020 Location: Virginia Posts: 233	Got my new bolts / lock nuts; got 'em on without any problems! Going to take it out for a spin sometime to make sure it's locked in nice 'n tight; recheck the torque around 75 - 100mi. I'll post back my results after I get some time to ride. BTW any suggestions for filter oil? I have some 90Wt. oil, was reading any heavy oil can be used to reapply the oil coating for the filter. Thanks again, MegaDan and Herbie! __________________ \|2020 X-Pro Titan DLX\| <-- FOR SALE!!
	1