RPS Hawk Unstable?

Slofun · 04-25-2021, 03:03 PM

2 Issues:
1.) My totally stock RPS Hawk doesn’t feel stable on the road. I have 32psi front 40 rear. It seems to want to wander side to side. I ride mostly for now on suburban and country roads. When I approach 40mph especially I feel the bike wants to move side to side - almost like I’m being hit with small gusts of wind. I have about 150 units on my odometer (km or mi - not sure which). Going over 40 at this point doesn’t seem safe. Is there something wrong with the bike or is it in my head?
2.) The long asphalt joint lines make the bike shimmy/shudder very fast side to side when my rear wheel gets in them. Is this normal? Same thing happens in the rain grooves on concrete roads. It’s really unsettling!

Thanks for any insight!

Bill Hilly · 04-25-2021, 04:05 PM

Concidering this time of year is kinda windy , I would say that you are indeed experiencing the wind shoving you around. I had a similar experience as you when I first started riding my Brozz on the faster roads. You learn to deal with it, but it is always going to be windy sometimes. You get used to it, and when you realize that even though you feel it pushing against you, you are still in control. I don't dread it now like I did. I especially dreaded watching oncoming vehicles coming towards me, in windy conditions. I only have about 550 miles on my bike now, so I am still inexperienced. I don't dread the wind like I did, but I do still get unpleasantly surprised by the gust from oncoming Semi , and box trucks. I am ready for them, but find them unpredictable. Sometimes it has little to no effect, and other times it really tries to throw the bike around. You will start to get used to it. I'm a worrier, and it make relaxing on the bike a longer process, but as I do get more, and more relaxed on the bike, the more a natural instinct takes over, and I realize that I have really advanced. One ideally needs to be intelligent enough to understand the potential risk of any situation, but confident enough to trust their ability. I have always been slow to gain confidence, but when I do get the hang of something ,I am usually average, or above average at doing it.

BakedOregonian · 04-25-2021, 04:25 PM

I'm embarrassed to admit this but I experienced a very similar issue until I realized I forgot to put the spacer on my front tire.

Slofun · 04-25-2021, 05:06 PM

Quote:

Originally Posted by BakedOregonian

I'm embarrassed to admit this but I experienced a very similar issue until I realized I forgot to put the spacer on my front tire.

Ah man, now you made me wonder. I checked. The spacer is in and the axle is all torqued down. My issue is probably wind and lack of confidence. Thanks Bill Hilly for walking me through it. Guess I just have to build confidence that when the bike wiggles around I’ll be ok.

Bruces · 04-25-2021, 05:22 PM

Have you tried messing with your tire pressure ?your numbers seem very high to me for a knobby tire bike .

krat · 04-25-2021, 06:44 PM

Nope, face it, it's the bike. Cheap materials and wanky tolerances.

I have a couple of good quality bikes and after riding them getting on the China bike scares me sh!%Le$$.

Skyd · 04-25-2021, 07:16 PM

Check your wheel bearings, especially the rear which are known failure points...apparently they're not so good at installing them properly.

TxTaoRider · 04-25-2021, 09:17 PM

Check your steering stem bearings. Mine were really loose, but too loose or too tight and the bike will weave.

Megadan · 04-25-2021, 09:39 PM

Quote:

Originally Posted by krat

Nope, face it, it's the bike. Cheap materials and wanky tolerances.

I have a couple of good quality bikes and after riding them getting on the China bike scares me sh!%Le$$.

Funny. My shitty chinese bikes have both been perfectly fine and stable., no .better or worse than my big name bikes. I think this is a case of PEBSAS - Problem Exists Between Seat And Sky.

Quote:

Originally Posted by TxTaoRider

Check your steering stem bearings. Mine were really loose, but too loose or too tight and the bike will weave.

This is where I would check first. Not only would a lack of proper tension cause these types of issues, but a lack of grease as well, which the Hawks are especially bad about. My steering stem bearings were completely devoid of grease. Proper prep and setup goes far with these bikes.

I also agree with Bruces, some of it might be in the tire pressure. 40psi is the max recommended rear, but that is intended for when riding 2 up, or if you are loaded down with luggage. If the tire doesn't have enough give it can feel a little twitchy due to a lack of resisfance.

Tractor Tom · 04-25-2021, 09:40 PM

On top of every one's comments, my experience with my new Hawk reminded me of how "weird" driving on blacktop with new knobby tires is. It has been a long time for me and even though I am a daily street MC driver, the Hawk feels very loose and doesn't want to track well. I replaced all my bearings and the air pressure is the recommended 32psi front and 40 rear. I love the bike so I'll keep trying to get used to it but I may change to a combo tire down the road. Good luck with your experience and bike.

Skyd · 04-26-2021, 09:59 AM

Quote:

Originally Posted by Tractor Tom

On top of every one's comments, my experience with my new Hawk reminded me of how "weird" driving on blacktop with new knobby tires is. It has been a long time for me and even though I am a daily street MC driver, the Hawk feels very loose and doesn't want to track well. I replaced all my bearings and the air pressure is the recommended 32psi front and 40 rear. I love the bike so I'll keep trying to get used to it but I may change to a combo tire down the road. Good luck with your experience and bike.

That's a good point as well, if you're not used to riding Knobbies on the pavement it can feel a bit weird. Especially for less experienced riders that might actually be gripping the bars way to hard and not letting the bike "flow"

Lots of good tips here though to find the source of the issue......The only one I disagree with is that it's because it's a chinese bike - that's just dog poopie, these bikes can be great with a little knowledge and prep.

duck9191 · 04-26-2021, 11:37 AM

What's your previous riding experience? If you are coming from a road bike, a knobby will feel squirrely as hell at first. Your pressure is pretty high, you will probably get some funny center ware after a while.

Wild Dog · 04-26-2021, 11:53 AM

Quote:

Originally Posted by krat

Nope, face it, it's the bike. Cheap materials and wanky tolerances.

I have a couple of good quality bikes and after riding them getting on the China bike scares me sh!%Le$$.

This is a prime example of why these bikes should be put together by professionals. Sadly the Average user will have a really hard time putting the bike together (properly) and when they fail to do so, it's easier to blame the motorcycle.

You can take the most expensive motorcycle in the world and if it is put together by someone that doesn't know how, it will ride like crap.

Quote:

Originally Posted by Slofun

2 Issues:
My totally stock RPS Hawk doesn’t feel stable on the road. I have 32psi front 40 rear. It seems to want to wander side to side.

Try to have both the front and rear at 30 psi.
Also check the spokes and the wheel bearings.

Skyd · 04-26-2021, 12:13 PM

Quote:

Originally Posted by Wild Dog

This is a prime example of why these bikes should be put together by professionals. Sadly the Average user will have a really hard time putting the bike together (properly) and when they fail to do so, it's easier to blame the motorcycle.

I disagree, there's no reason why the average joe with a little bit of mechanical knowledge can't put these together. In fact these bikes are a GREAT way to learn how to wrench on your bikes. The biggest factor here (assuming the person is competent) is the lack of assembly instructions. So people need to do a little of their own research if they are unsure. And yes, these need a little extra care.

I agree with the end of your statement, when not assembled and setup properly it's easy to blame the bike and many people will. I always assume I did something wrong before I blame whatever equipment I'm dealing with, but that's just me.

Wild Dog · 04-26-2021, 01:19 PM

Quote:

Originally Posted by Skyd

I disagree, there's no reason why the average joe with a little bit of mechanical knowledge can't put these together. In fact these bikes are a GREAT way to learn how to wrench on your bikes. The biggest factor here (assuming the person is competent) is the lack of assembly instructions. So people need to do a little of their own research if they are unsure. And yes, these need a little extra care.

I agree with the end of your statement, when not assembled and setup properly it's easy to blame the bike and many people will. I always assume I did something wrong before I blame whatever equipment I'm dealing with, but that's just me.

The Average Joe i'm talking about is the one that don't want to learn and just blame the product because it's made in China, or in "x" place
Instead of finding if he or she made and mistake and how to fix it.

04-25-2021, 03:03 PM	#1
Slofun Join Date: Mar 2021 Posts: 40	RPS Hawk Unstable? 2 Issues: 1.) My totally stock RPS Hawk doesn’t feel stable on the road. I have 32psi front 40 rear. It seems to want to wander side to side. I ride mostly for now on suburban and country roads. When I approach 40mph especially I feel the bike wants to move side to side - almost like I’m being hit with small gusts of wind. I have about 150 units on my odometer (km or mi - not sure which). Going over 40 at this point doesn’t seem safe. Is there something wrong with the bike or is it in my head? 2.) The long asphalt joint lines make the bike shimmy/shudder very fast side to side when my rear wheel gets in them. Is this normal? Same thing happens in the rain grooves on concrete roads. It’s really unsettling! Thanks for any insight!
	0

04-25-2021, 06:44 PM	#6
krat Join Date: Nov 2019 Location: KY Posts: 260	Nope, face it, it's the bike. Cheap materials and wanky tolerances. I have a couple of good quality bikes and after riding them getting on the China bike scares me sh!%Le$$. __________________ %90 of the Chinese motorbikes ever made are still on the road. The other %10 made it back home.
	0

04-25-2021, 07:16 PM	#7
Skyd Join Date: Mar 2021 Location: New Hampshire Posts: 242	Check your wheel bearings, especially the rear which are known failure points...apparently they're not so good at installing them properly. __________________ 2020 RPS Hawk 250 - Build thread can be found here: http://www.chinariders.net/showthread.php?t=28374 "Do Wheelies and Forget your Feelies" "If vegetarians eat vegetables, what do humanitarians eat?" -unknown
	2

04-25-2021, 09:17 PM	#8
TxTaoRider Join Date: Oct 2020 Location: Flower Mound Texas Posts: 904	Check your steering stem bearings. Mine were really loose, but too loose or too tight and the bike will weave. __________________ 2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene"
	1

04-26-2021, 11:37 AM	#12
duck9191 Join Date: May 2019 Location: Port Huron, Michigan Posts: 637	What's your previous riding experience? If you are coming from a road bike, a knobby will feel squirrely as hell at first. Your pressure is pretty high, you will probably get some funny center ware after a while. __________________ 2020 Triumph Tiger 900 rally. 2018 Bashan Storm 250. pz30b, digital cluster + gear indicator, unifilter and car customs full exhaust. 2019 Taotao 110b boulder atv. The "arm breaker" lol 2007 Honda VTX 1300R. 1974 Suzuki tm125, work in progress 2001 Suzuki Drz 400s.
	0

04-25-2021, 04:05 PM	#2
Bill Hilly Join Date: Feb 2021 Posts: 934	Concidering this time of year is kinda windy , I would say that you are indeed experiencing the wind shoving you around. I had a similar experience as you when I first started riding my Brozz on the faster roads. You learn to deal with it, but it is always going to be windy sometimes. You get used to it, and when you realize that even though you feel it pushing against you, you are still in control. I don't dread it now like I did. I especially dreaded watching oncoming vehicles coming towards me, in windy conditions. I only have about 550 miles on my bike now, so I am still inexperienced. I don't dread the wind like I did, but I do still get unpleasantly surprised by the gust from oncoming Semi , and box trucks. I am ready for them, but find them unpredictable. Sometimes it has little to no effect, and other times it really tries to throw the bike around. You will start to get used to it. I'm a worrier, and it make relaxing on the bike a longer process, but as I do get more, and more relaxed on the bike, the more a natural instinct takes over, and I realize that I have really advanced. One ideally needs to be intelligent enough to understand the potential risk of any situation, but confident enough to trust their ability. I have always been slow to gain confidence, but when I do get the hang of something ,I am usually average, or above average at doing it.
	0

04-25-2021, 04:25 PM	#3
BakedOregonian Join Date: Apr 2021 Location: Oregon Posts: 64	I'm embarrassed to admit this but I experienced a very similar issue until I realized I forgot to put the spacer on my front tire.
	1

04-25-2021, 05:22 PM	#5
Bruces Join Date: May 2018 Posts: 1,579	Have you tried messing with your tire pressure ?your numbers seem very high to me for a knobby tire bike .
	0

04-25-2021, 09:40 PM	#10
Tractor Tom Join Date: Mar 2021 Posts: 13	On top of every one's comments, my experience with my new Hawk reminded me of how "weird" driving on blacktop with new knobby tires is. It has been a long time for me and even though I am a daily street MC driver, the Hawk feels very loose and doesn't want to track well. I replaced all my bearings and the air pressure is the recommended 32psi front and 40 rear. I love the bike so I'll keep trying to get used to it but I may change to a combo tire down the road. Good luck with your experience and bike.
	1