Topic: Sprockets

[lucky]

I took a photo since You do not believe me.
There is nothing except my sprocket and the four studs sticking out of the hub.
No drive plate  or whatever.

[lucky]

Ok...I made a mistake.
How much mileage can you get out of it? Cheeeeeessssshhhh!

You've made 9 worthless posts so far on this thread. How much more mileage can YOU get out of it?

I apologized for my mistake on the gear ratios.
When I asked question about K8 gear ratios nobody knew anything.
Now you are all attacking me and ganging up on me starting with bollingboll.
You all know everything so I guess I will not be coming back to this forum.

[mycb750k6]

Atta boy Scottly

[MCRider]

I took a photo since You do not believe me.
There is nothing except my sprocket and the four studs sticking out of the hub.
No drive plate  or whatever.

C'mon Lucky. Don't be difficult. I explained my definition of drive plate is the sprocket carrier. That is the part the sprocket bolts to, shown in your picture. The 4 studs are not in the hub. The 4 studs are in the drive plate/Sprocket Carrier/flange, driven. That part comes loose from the hub, which is a separate part.

What do you call it?

Regardless of all your degrees and credentials, you make plenty of mistakes and misleading advice.

When I don't know or am not sure, I try to always say so up front, as I have in this thread.

Your question about the K8 gear ratio (actually you asked for sprocket ratio) is simply the same as the K7. Divide one spkt by the other. Surely you know that?

[lucky]

I took a photo since You do not believe me.
There is nothing except my sprocket and the four studs sticking out of the hub.
No drive plate  or whatever.

C'mon Lucky. Don't be difficult. I explained my definition of drive plate is the sprocket carrier. That is the part the sprocket bolts to, shown in your picture. The 4 studs are not in the hub. The 4 studs are in the drive plate/Sprocket Carrier/flange, driven. That part comes loose from the hub, which is a separate part.

What do you call it?

Regardless of all your degrees and credentials, you make plenty of mistakes and misleading advice.

When I don't know or am not sure, I try to always say so up front, as I have in this thread.

Your question about the K8 gear ratio (actually you asked for sprocket ratio) is simply the same as the K7. Divide one spkt by the other. Surely you know that?

My sprocket bolts to 4 studs coming out of the hub.
There could be something inside the hub, but I do not remember now its been a few months since I had it all apart. But I see no plate on the outside that is separate.
I looked closely at it . Maybe that part is where the cush drive rubbers are located.
I did replace those too but I just thought it was all part of the hub.
Anyway I will look up the Honda parts list and see what Honda calls it.

[scottly]

Here is a pic of a K7 drive plate/sprocket carrier/ potato whatever the #$%* you want to call it, removed from the wheel. This is a pic I took while helping a member solve his off-set problem, due to using an early motor in a late frame. Now please shut up, as this has nothing to do with the original poster's question.

[piute]

   My 1977 F2 has 14 x 43 ,I put on 15 up front still has 630 chain,bigg differences ,think of trying a 40 next just for testing diff,I'm more of touring then ,racing ,realize may be bit of lug at 1st in 1st but just take thoughts R's up in them others ,shouldn't be a prob.

[killersoundz]

I have a k4. Many people suggested the 17/48 sprockets to me when I asked. Stock on my bike is 18/48. Personally I think it revs too high with the 17, I can ride it in 5th gear at 25mph. Makes 60mph+ pretty ridiculous. I'll be getting an 18 on there

[dhall57]

Ok...I made a mistake.
How much mileage can you get out of it? Cheeeeeessssshhhh!

You've made 9 worthless posts so far on this thread. How much more mileage can YOU get out of it?

Ok...I made a mistake.
How much mileage can you get out of it? Cheeeeeessssshhhh!

You've made 9 worthless posts so far on this thread. How much more mileage can YOU get out of it?

My rule of thumb for this forum. Threads that I know something about and can give useful and helpful info that will help another member out with there sohc4 I jump right in. But the ones I know little or nothing about I stay out of it and just read and listen and keep my mouth shut and let the one's that do post away. But that's just me.

[bollingball]

Ok...I made a mistake.
How much mileage can you get out of it? Cheeeeeessssshhhh!

You've made 9 worthless posts so far on this thread. How much more mileage can YOU get out of it?

I apologized for my mistake on the gear ratios.
When I asked question about K8 gear ratios nobody knew anything.
Now you are all attacking me and ganging up on me starting with bollingboll.
You all know everything so I guess I will not be coming back to this forum.

Lucky No need to leave we all make mistakes myself especially. I try to own up to them and move on. I have a lot to learn. I hope I learn something new every day until my last one.
 Some of the things you say get on my nerves and I answer back a little to soon and say things maybe I should not. This place is not for a popularity contest. Try to think about your answers before posting. Like I should. There enough boo hoo crap get out the wrenches.
Ken

[MCRider]

I have a k4. Many people suggested the 17/48 sprockets to me when I asked. Stock on my bike is 18/48. Personally I think it revs too high with the 17, I can ride it in 5th gear at 25mph. Makes 60mph+ pretty ridiculous. I'll be getting an 18 on there

18/48 is perfectly fine (on 530 bikes). Your comments about the 17 makes it rev too high indicates to me you may have influences from prior engines?

The in line 4s rev higher than older twins, especially Harleys and Brits of that era for example. You just have to develop an ear for the higher revs and learn to love them. Rule of thumb is that you should fast cruise at about 2/3 throttle. So 70+/- on a CB750 should be around 5333 RPMs. This should put you in the sweet spot for MPG, and available passing power.

You can gear it to lug around at lower RPMs, but you're missing out on the available fun.

Unless of course, lugging around is your fun. In which case, more power to you, so to speak.     You might like an 18/45. 

I love 17/48.

[bollingball]

McRider
 It is clear to me you know a lot more about these sprocket #s than I do. So I ask you this. I have a 78K 750 that has a 15-41 630 setup. I think that is stock. The bike has been down a couple of months and I am about to put it back on the road and have a new set of the same sprocket and chain but may not use it depending on what you say.
 I like what you said about 2/3 throttle at 70mph and around 5333RPMs. I don't recall what my readings were with my current setup. Could you give me your best guess as to what I should use. I would like to stay with the 630 chain this time ( it is new and I all ready have it ) and change to 530 when this one wears out. I could sell it and change to 530 now if you could give me the numbers for 630 and 530 that would be great.

                                                       Thanks in advance.
                                                               Ken

[lucky]

Here is a pic of a K7 drive plate/sprocket carrier/ potato whatever the #$%* you want to call it, removed from the wheel. This is a pic I took while helping a member solve his off-set problem, due to using an early motor in a late frame. Now please shut up, as this has nothing to do with the original poster's question.

This sounds like a bully and the little motocon looks just like a bully.

[robvangulik]

@ Ken, 18/48 is exactly, to 21 decimals, the same sprocket ratio as 15/40, so a tiny bit lower in revs as the 15/41 you have now....

[MCRider]

@ Ken, 18/48 is exactly, to 21 decimals, the same sprocket ratio as 15/40, so a tiny bit lower in revs as the 15/41 you have now....

Yeah, what he said. Depending on how you ride, the 18/48 is fine for a lower rpm cruise. What i consider a lower rpm cruise may be just right for someone else. And cruising is what you like to do. You'll likely want to downshift to get highway passing power, and that's fine.

You can always throw a 17 in there if you're doing a lot of around town stuff, or curvy coutry roads where you want to press a little bit.

Of course just cuz a road is curvy doesn't mean you can't just cruise through it. It's all up to you. Not life or death, easy to change.

[Tews19]

Not trying to HI jack but DAMN!!! I tried to place an order for my K1 and seems that everyone is out who I contacted. Earliest would be Oct. 16th!!!!!!!!!

Am I looking or giving the wrong information out? 17 front and 48 rear for my 71 750?

[MCRider]

Not trying to HI jack but DAMN!!! I tried to place an order for my K1 and seems that everyone is out who I contacted. Earliest would be Oct. 16th!!!!!!!!!

Am I looking or giving the wrong information out? 17 front and 48 rear for my 71 750?

Stock would be 18/48. But 17s should be widely available (at least as much as 18s)

[bollingball]

And cruising is what you like to do. That is just how I like to ride. I don't mind kicking it down a gear or two. If need be.
So I will stay with what I have for now. Thanks to everyone.
 I stay out of town at all cost. We just got a 5th red light. Damn country is not what it use to be. At least town is 8 miles away.
Ken

[bjatwood]

I went from a 17/48 to a 18/48 for cruise ability, as I ride 32 miles to work one way. This increased my milage 5 MPG, to 45-47 ish. I don't feel I miss a thing as 70 is now 4,900 rpm and a quick downshift/throttle twist gets it up to 90 before 5th gear is "selected" for some more flight time! 
With the 18 tooth you can roll up to 25 mph in first gear with hardley any throttle at all. And I'm sure top end would be a bit higher if you want to try. 100mph is good enough for me with the pizza cutter rear wheel we all have! LOL

[scottly]

1977 cb750f is what I'm riding...

Please determine how many teeth are on your current 630 sprockets, and we can tell you what the equivalent size 530 sprockets are.

[aperry]

18/48 is perfectly fine (on 530 bikes). Your comments about the 17 makes it rev too high indicates to me you may have influences from prior engines?

The in line 4s rev higher than older twins, especially Harleys and Brits of that era for example. You just have to develop an ear for the higher revs and learn to love them. Rule of thumb is that you should fast cruise at about 2/3 throttle. So 70+/- on a CB750 should be around 5333 RPMs. This should put you in the sweet spot for MPG, and available passing power.

You can gear it to lug around at lower RPMs, but you're missing out on the available fun.

Unless of course, lugging around is your fun. In which case, more power to you, so to speak.     You might like an 18/45. 

I love 17/48.

Thanks for this.  The first time I took my 750K3 out on the highway, I was really surprised at how it was reving in 5th gear just to hit 80MPH.  I believe I'm running 17/45 right now. 

My history is on cruisers (Honda Shadow with v-twin, and BMW R1200C with boxer engine) that tend to rev much lower.  It's taken some adjustment on my part to get a feel for these higher reving machines.

[robvangulik]

17/45 is virtually the same as 18/48, 2.64 against 2.6666
I think 18/45 is a bit tooo long, even 4th will feel like an overdrive.

[piute]

   My 1977 F2 has 14 x 43 ,I put on 15 up front still has 630 chain,bigg differences ,think of trying a 40 next just for testing diff,I'm more of touring then ,racing ,realize may be bit of lug at 1st in 1st but just take thoughts R's up in them others ,shouldn't be a prob.

  No lug at all to me just seemed a bit noisy due to front faring,as metioned getting used to the different sounds this bike makes takes some time to get used to .
I know just ordered a 16T to go on that 630 chain,with my speedo N tach both working (new cables)testing 15 T tue's day(30mile's to work Co.hwy 60m.p.h. ,Interstate home 70++,will give notes...Piute

[piute]

                                                 O.K.
     Tryed the 16T and like it,For the way I would like to run the bike "IF"I didn't have to use it for main trans-po,
                     5th gear TACH at 5k(16T) gives me 70m.p.h.with 15T at 5k get 65m.p.h.,
     Having fun carving curves in the Ozarks the 15T gets my vote ,don't even need 5th gear 3rd and 4th through out all these curves(never in RED) the past month has been great,
      16T would be great if I stuck to the Interstate (it's close but,DON"T LIKE)other hwy at 70m.p.h. is great for me.(posted 60m.p.h. though).
                                            New front tire here to day