Rear sprocket nuts, swap for bolts? - Page 4 - Yamaha R1 Forum: YZF-R1 Forums
09-14 R1 Mechanical Help Mechanical and Critical Issues for the 09-14 R1

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post #61 of 77 (permalink) Old 03-13-2016, 08:34 PM Thread Starter
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Originally Posted by Redgecko View Post
He said grade 5. The new M has one use only case bolts, they could have used steel there too.
It's done for a reason and the OP stated his reasons for using TI.
No one says it's the strongest material out there but then he's not riding a Howitzer into battle either.


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It's like kankles for your head!!

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post #62 of 77 (permalink) Old 03-13-2016, 09:18 PM
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Personally, I would be careful selecting bolts in some of the high load areas of the motorcycle. Ti case bolts are a no brainer, they just hold the covers on, not much of any load. Ti axles? Sure, fairly thick and beefy, not much chance of shearing a Ti axle. A sprocket bolt is a fairly high load bolt. Sure Ti bolts will work assuming you have the proper strength. It is not a bolt I would take a chance on in I was unsure of the quality of the bolt. Imagine the chaos that could happen if your sprocket bolts sheared of at 100 MPH.
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post #63 of 77 (permalink) Old 03-13-2016, 09:26 PM
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Bst has ti bolt option for carbon wheels. Im sure you will be fine. Looks great. Wanna see it wired


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post #64 of 77 (permalink) Old 03-13-2016, 09:27 PM Thread Starter
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Yeah I've though about that. Then I look at the little m6 bolts that hold on the brake rotor. They probably see the same amount if not more than the sprocket. Thoughts? Ti bolt has 880MPa, and 950MPa tensile strength minimum. Maybe my conversions off, but that's 149388.831 psi.


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It's like kankles for your head!!

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post #65 of 77 (permalink) Old 03-13-2016, 10:52 PM
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When are you guys going to realize that high grade steel is stronger than titanium? Titanium is not some magic metal, it has benefits (lightness) at the cost of some negatives (namely, strength) when compared to high grade steel.

If you had to make a fastener that weighed 2 oz, titanium would have the advantage, as you could make it larger. But you're replacing a particular size of bolt/fastener with titanium, which makes it weaker.

I work on M777 howitzers, which use titanium extensively in the carriage and spades, to keep the weight down so that the gun can be air-lifted. There isn't a single titanium fastener on the gun. Know why? It's not as strong as high grade steel.

Seriously, it's your money so spend it how you want, but don't go fooling yourself into thinking you're smarter than the engineers who designed the bike.

An argument in a thread where none existed. The R1 isn't launching explosive projectiles at enemy ground forces either. I think the Grade 5 Ti bolts he got are more than enough for the job. Probably enough to hold together that peashooter you mentioned too.

https://www.probolt-usa.com/titanium...ce-spec-1.html
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post #66 of 77 (permalink) Old 03-13-2016, 11:29 PM Thread Starter
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An argument in a thread where none existed. The R1 isn't launching explosive projectiles at enemy ground forces either. I think the Grade 5 Ti bolts he got are more than enough for the job. Probably enough to hold together that peashooter you mentioned too.

https://www.probolt-usa.com/titanium...ce-spec-1.html
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In all seriousness, this wasn't to start an argument. I had every intention to have Ti road threaded, and use that as stud. I actually have two pieces of rod here (no pun intended). But I sat back and though about it. Came to the conclusion that I could just do it with bolts instead.

Now, next serious question. How should I safety wire these. All six tied together, or just do two to each other, in a backwards S fashion?


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post #67 of 77 (permalink) Old 03-13-2016, 11:53 PM
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I don't believe the hub has every changed. If you've never pulled the studs before, a propane torch to heat them up will be nice to have.
thanks, good info.

any chance you can throw the stock studs on a kitchen scale? im curious as to the actul weight difference.
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In all seriousness, this wasn't to start an argument. I had every intention to have Ti road threaded, and use that as stud. I actually have two pieces of rod here (no pun intended). But I sat back and though about it. Came to the conclusion that I could just do it with bolts instead.

Now, next serious question. How should I safety wire these. All six tied together, or just do two to each other, in a backwards S fashion?
if it was me, Id be doing them as the 'S' tyle, so that if one loosens, the other tightens.

If you do all 6 in one peice, and the wire breaks (Rare I know) then A) you have a LONG peiece getting tangled in stuff, and B, all bolts would be able to loosen.

Doing them 2 at a time should mean less stress on the wire, shorter lengths to get jammed /tangled, and even if it breaks, only 2 bolts could start to loosen, instead of all 6 - which I would consider important given the ti to alu requiring anti-seize in stead of loc-tite issue.


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thanks petrol!!
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post #68 of 77 (permalink) Old 04-06-2016, 03:42 AM
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Update... not safety wired yet, waiting in a 43t sprocket. But looks snazzy.

By the way brother, that looks sawheeet!

You get the other sprocket in and safety wired yet?
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post #69 of 77 (permalink) Old 04-06-2016, 06:50 AM Thread Starter
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By the way brother, that looks sawheeet!

You get the other sprocket in and safety wired yet?
Yes sir, everything is in and going really well so far.
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post #70 of 77 (permalink) Old 04-06-2016, 06:59 AM
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looks sick!!! very nice


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post #71 of 77 (permalink) Old 04-06-2016, 09:50 AM
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Looks really nice!!! I just mounted my BST's and found out when I was putting my sprocket on that the hub is totally different in size and it only has 5 bolts instead of 6 (pretty strange) What sprocket you running on the front. I noticed you went down 2 in the back, I did the opposite and went up 2 in the back and down 1 in the front and the down low power is sick. My days of going over 160 are over.


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post #72 of 77 (permalink) Old 04-06-2016, 08:46 PM
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Yes sir, everything is in and going really well so far.

fvcking righteous! I may steal this idea in the near future.
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post #73 of 77 (permalink) Old 04-06-2016, 10:47 PM Thread Starter
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Looks really nice!!! I just mounted my BST's and found out when I was putting my sprocket on that the hub is totally different in size and it only has 5 bolts instead of 6 (pretty strange) What sprocket you running on the front. I noticed you went down 2 in the back, I did the opposite and went up 2 in the back and down 1 in the front and the down low power is sick. My days of going over 160 are over.
Im currently -2 front, and -4 rear. So that puts me at 15/43. Pretty close to a -1 ratio, which slightly more top end. I think im going to buy another cush assembly (about 100 bucks) to make swaping sprockets easier. Ill probably throw a 44t on that one.





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fvcking righteous! I may steal this idea in the near future.

So far im loving it man. Rotational mass is hard to drop, because theres only so much you can do. Those studs were pretty heavy.


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post #74 of 77 (permalink) Old 04-15-2016, 04:12 AM
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Rear sprocket nuts, swap for bolts?

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Originally Posted by cyclepsycho7 View Post
Looks really nice!!! I just mounted my BST's and found out when I was putting my sprocket on that the hub is totally different in size and it only has 5 bolts instead of 6 (pretty strange) What sprocket you running on the front. I noticed you went down 2 in the back, I did the opposite and went up 2 in the back and down 1 in the front and the down low power is sick. My days of going over 160 are over.

Driven is only sprocket i found that has 49t sprocket for bst wheels . I found out same way you did. Lol. Go to http://www.solomotoparts.com/


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Last edited by WestSide_'10R1; 04-15-2016 at 04:57 AM.
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post #75 of 77 (permalink) Old 04-15-2016, 05:28 AM
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Driven is only sprocket i found that has 49t sprocket. I found out same way you did. Lol. Go to SoloMotoParts.com - Motorcycle Parts, Gear & Accessories


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Thanks for the info. I ordered the Driven sprocket from MotoMummy along with a Shorai battery. I'm a bit disappointed though. I placed the order on April 1st and still haven't received my parts yet.

Edit: Spoke to early, the parts just came in. Off to the garage


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Last edited by cyclepsycho7; 04-15-2016 at 07:02 AM.
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post #76 of 77 (permalink) Old 04-15-2016, 03:18 PM
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Hahahhaha. Get it done!!🔥🔥🔥


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post #77 of 77 (permalink) Old 06-07-2019, 11:34 AM
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Any updates to this, I assume it worked out ok long term?


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