Question about 2001 Yamaha YZF Thunder ace 1000 R

1 Answer

The thread on the drive shaft where the front sprocket is attached has stripped. is it possible to weld or rethread as this is hardened metal ? any advice would be appreciated thank you

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An user who is expert in 3 categories / brands.

  • Yamaha Master
  • 1,508 Answers

You have probably already been told the only permanant fix is a new shaft.
I have seen these nuts welded on as a temp solution, it can damage the seal and cause an oil leak, If you go for this option.Use a high nicklel rod like a stainless steel rod, and do a couple of small welds with cooling time between. but remember this can fail with unknown consequences.
Do not do this just to sell the bike, if it fails and throws someone down the road, you will be responsible, and in the worse case liable for prosecution

Posted on May 21, 2011


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

The bolt broke off in the crankshaft on the PTO on my Cub Cadet LT1042 I drilled it out off centered , how do I have it welded & rethreaded ?

the news will not what you want to read but ---
the cost to do hat will be more than the motor is worth
welding the hole up will be a disaster as the weld will not go down the hole but simply weld over the top
next to drill the hole if you were successful in the welding would need the shaft to placed in a lathe so that it could be drilled dead center and the thread in installed straight in
I would suggest that you get the price of a shaft from a mower shop or from a mower wreckers or get the price of a new motor and then make a decision from there

Apr 04, 2016 | Cub Cadet Garden

2 Answers

Pedaling bike but wont move

Perhaps there is a gear with stripped thread where it attaches to the sprocket or the sprocket itself with stripped thread? In any of these cases, the whole sprocket should be replaced and in the second case the sprocket and hub. This accounts only for 6 or 7 gear sprockets.

Apr 19, 2014 | Huffy Cycling

1 Answer

Engine runs but wheels do not move

This could be a few things:
1) Your clutch plates may have worn out so that even when the bike is in gear, it will just rev, but no power will be transmitted to the drive shaft (smaller front chain sprocket is the driving gear, larger rear sprocket on the back wheel is the driven gear)
2) The front chain drive sprocket has come off under the cover on the motor - if the chain is really slack, have a look.
3) The front chain drive sprocket SHAFT has sheared. (basically, meaning that the shaft has broken into two parts as it couldn't handle the drive power (torque) being delivered through it to the chain drive) With the motor on, listen for grinding noises internally
when you rev, from the vicinity of the front chain drive cover. If its rough and grindy, the shaft may be sheared. Then with the motor off, take the cover off and leverage the small chain drive sprocket away from the motor with a screwdriver, and see if the shaft can just be pulled out of its sealed opening. Unfortunately with these bikes, the metals used in drive shafts and motors are not always heat-treated or hardened to the standard they should be, so shearing and premature failure can happen.
4) The gearbox or something in it has blown, unfortunately for the same reason above, quality related.
Its fair to say that these great little bikes are here for a good time, but not for a long time.

Apr 11, 2014 | Razor MX350 DIRT ROCKET - BLUE

1 Answer

TB525es attachments no longer working

NOT THE CLUTCH.. Mine started doing the same thing recently...what I found is the metal piece at the end of the main shaft that accepts the drive from the accessory was stripped out....the part from MTD/Troybilt is $60... Save the $60 its an easy fix....

Remove the sleeve at the end of main shaft.... clean thoroughly with brake cleaner...

Mix a small amount of JB Weld and fill along the walls of the "rounded out" area..Let set for about 2 hours so it gets firm but soft...

Take an attachment, and slide it up into the receiver..making sure to align them square with the receiver. this will form the JB Weld putty to the drive piece. remove the attachment immediately!!!.
Then let it set over night.... DONE works like a champ again next day.....

Dec 04, 2013 | Troy Bilt Tb425cs 26cc 4 - Cycle Curved -...

1 Answer

My gear will turn without having the chain on . When chain is attached it the motor just works. No chain movement

I wasn't familiar with your saw but I looked at the parts diagram for it in the link below thinking there may be a replaceable drive pin or something like it that would possibly have sheared.
I didn't see any. That would indicate that the sprocket may be stripped out on the inside and would require replacement, or, that there is something stripped inside the gearcase. If you look at the diagram, the motor shaft is parallel with the handle. So to drive the sprocket gear that drives the chain, they use gears inside the housing to turn the sprocket that's at a right angle to the motor shaft. Do you follow me? It would appear from the parts diagram that if it is those internal gears, that it would require replacement of the whole motor/gear assembly ...... probably as expensive as a whole new saw!

The reason that the sprocket turns without the chain on is that there is evidently enough friction between the shaft that the sprocket mounts on, and, the sprocket. But not enough of a connection to drive the chain.

To check further, leave the saw unplugged, and use your finger to try to turn the sprocket. If it turns by hand like that, it would indicate that something is stripped out as I said. To see if it is the sprocket, remove the "Retaining Ring, 5/16" that is shown in the diagram, and inspect the inside of the sprocket. If that appears good, then it would be an internal problem and probably not worth fixing.
Good luck!

Oct 31, 2013 | Remington 111409 - 01 6" Branch Wizard...

1 Answer

How to gix front sprocket

Take a better end view of the output shaft where the sprocket goes and I will be able to tell you what goes there. It normally has either a large nut that threads on the output shaft, a bolt w/washer that screws inside the output shaft, or a retainer clip/metal bracket that attaches to the the sprocket and output shaft. Take some clearer pics of the shaft end and new sprocket and post them.

Jun 13, 2013 | Motorcycles

1 Answer

YZF 600R thundercat Yamaha 1997

the chain broke the countershaft!! wow that's a first.. i really hope its not made of aluminum... its not that strong a metal..i would think a hardened steel more likely, because that thing goes through the entire gearbox and to the other side where the clutch is attached. Its the main drive shaft with the front drive sprocket (countershaft) attached that were talking about...right? This will mean an entire engine case breakdown...we're talking major $$$$$$$.

Apr 04, 2010 | 1996 Yamaha YZF 600 R thunder cat

1 Answer

Injetor pump removal for 1hz diesel

Hi there Luke. The sprocket gear of the pump is sitting on a taper lock on the pump shaft, you have to use a puller to get it off the shaft. Mount the puller to the threaded holes on the sprocket and when it is tight, give it a sharp crack with a hammer, it will then pop off.
Caution!!!!! Do not hit to hard the pump shaft has a transfer pump attached inside that is quite sensitive.
Before you do drastic things like removing the pump please read the attached manual on setting the timing, special tools are needed to reset the timing.3d2b4ea.jpg

May 17, 2009 | 1992 Toyota Land Cruiser

1 Answer

Bissell Proheat 2x Series 8920 - Brush Belt Metal Shaft Sprocket won't turn

Most likely the brush motor is bad and not turning, part #2036757, would sell for around $23. To get to it, start taking out screws on the top cover, that motor is under the that top access cover.

Jan 22, 2008 | Bissell 8910 ProHeat Clear View Upright...

Not finding what you are looking for?
2001 Yamaha YZF Thunder ace 1000 R Logo

130 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts


Level 2 Expert

314 Answers


Level 3 Expert

1216 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1165 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides