Planet Minis

leftybowler22 · 05-22-2009, 09:53 PM

I have a TRX70 with a TB 88cc race head. I was cruising down the road in 4th gear and a loud knocking, slapping noise started. It was like the chain was slapping the chain cover or the chain was jumping the sprocket from being loose. I took all the covers off and tightened the chain a little but it didn't help. It still knocks, locks up, and slips in all 4 gears. I guess I'll probably have to split the cases to find out what's wrong but I was just wondering if anybody had any input. I was thinking a broken tranny tooth or 2 but why would it be all 4 gears?

leftybowler22 · 05-23-2009, 08:06 PM

Anyone have any input?

firepower354 · 05-23-2009, 08:13 PM

If it's knocking, open it up.

leftybowler22 · 05-23-2009, 08:46 PM

Yeah, I think I'll have too....

dirtbkr188 · 05-24-2009, 06:46 AM

Quote:

Originally Posted by leftybowler22

I have a TRX70 with a TB 88cc race head. I was cruising down the road in 4th gear and a loud knocking, slapping noise started. It was like the chain was slapping the chain cover or the chain was jumping the sprocket from being loose. I took all the covers off and tightened the chain a little but it didn't help. It still knocks, locks up, and slips in all 4 gears. I guess I'll probably have to split the cases to find out what's wrong but I was just wondering if anybody had any input. I was thinking a broken tranny tooth or 2 but why would it be all 4 gears?

Maybe a tooth missing on the primary drive gear?

leftybowler22 · 05-24-2009, 08:20 AM

Hey, thanks for your reply again. It might be a good thing I didn't sell you that extra parts tranny, I might need parts from it now! If it is the primary drive gear, would an xr50 one work because I have an extra one of those?

leftybowler22 · 05-24-2009, 08:22 AM

The noise does seem to be coming from the LEFT side of the engine though??? We'll see I guess...

Grafixxs · 05-24-2009, 08:27 AM

If its slipping, your clutch pack my be coming apart.

leftybowler22 · 05-24-2009, 08:33 AM

Yeah??? possibilty, I'm liking these problems over having to split the cases. I'll try and get to it this week and I'll update this post with what I find out. Thanks alot everyone

leftybowler22 · 05-24-2009, 08:34 AM

And on that note, would a xr50 clutch assembly bolt right on, I have an extra one of those also?

Grafixxs · 05-24-2009, 08:51 AM

Good question... Im thinking parts from it will work but I think the spline might be different, could be wrong tho.

dirtbkr188 · 05-24-2009, 01:13 PM

Quote:

Originally Posted by leftybowler22

Hey, thanks for your reply again. It might be a good thing I didn't sell you that extra parts tranny, I might need parts from it now! If it is the primary drive gear, would an xr50 one work because I have an extra one of those?

Yes, the primary drive gears are the same - 17/69 - the primary gear from the XR50 will work.

Quote:

Originally Posted by leftybowler22

And on that note, would a xr50 clutch assembly bolt right on, I have an extra one of those also?

Yes, the XR basket will fit right on the TRX70 crank spline.

05-22-2009, 09:53 PM	#1 (permalink)
leftybowler22 1st Gear Member Join Date: Nov 2008 Location: East Bethel, MN Posts: 169	TRX70 Tranny knocking??? I have a TRX70 with a TB 88cc race head. I was cruising down the road in 4th gear and a loud knocking, slapping noise started. It was like the chain was slapping the chain cover or the chain was jumping the sprocket from being loose. I took all the covers off and tightened the chain a little but it didn't help. It still knocks, locks up, and slips in all 4 gears. I guess I'll probably have to split the cases to find out what's wrong but I was just wondering if anybody had any input. I was thinking a broken tranny tooth or 2 but why would it be all 4 gears?

05-23-2009, 08:06 PM	#2 (permalink)
leftybowler22 1st Gear Member Join Date: Nov 2008 Location: East Bethel, MN Posts: 169	Re: TRX70 Tranny knocking??? Anyone have any input?

05-23-2009, 08:13 PM	#3 (permalink)
firepower354 Advertiser Join Date: Oct 2006 Location: Flint MI Posts: 10,989 My Mood:	Re: TRX70 Tranny knocking??? If it's knocking, open it up. __________________ If it has my name on it I did it;) FirepowerMinis.com Custom FPM parts and engines. Parts and service for all makes. Honda Trail Bikes parts and accessories. Pitster/Piranha/Thumpstar bikes, parts, engines and accessories.

05-23-2009, 08:46 PM	#4 (permalink)
leftybowler22 1st Gear Member Join Date: Nov 2008 Location: East Bethel, MN Posts: 169	Re: TRX70 Tranny knocking??? Yeah, I think I'll have too....

05-24-2009, 08:20 AM	#6 (permalink)
leftybowler22 1st Gear Member Join Date: Nov 2008 Location: East Bethel, MN Posts: 169	Re: TRX70 Tranny knocking??? Hey, thanks for your reply again. It might be a good thing I didn't sell you that extra parts tranny, I might need parts from it now! If it is the primary drive gear, would an xr50 one work because I have an extra one of those?

05-24-2009, 08:22 AM	#7 (permalink)
leftybowler22 1st Gear Member Join Date: Nov 2008 Location: East Bethel, MN Posts: 169	Re: TRX70 Tranny knocking??? The noise does seem to be coming from the LEFT side of the engine though??? We'll see I guess...

05-24-2009, 08:27 AM	#8 (permalink)
Grafixxs Old Fart Join Date: Apr 2007 Location: Marshall,MI Posts: 1,945 My Mood:	Re: TRX70 Tranny knocking??? If its slipping, your clutch pack my be coming apart.

05-24-2009, 08:33 AM	#9 (permalink)
leftybowler22 1st Gear Member Join Date: Nov 2008 Location: East Bethel, MN Posts: 169	Re: TRX70 Tranny knocking??? Yeah??? possibilty, I'm liking these problems over having to split the cases. I'll try and get to it this week and I'll update this post with what I find out. Thanks alot everyone

05-24-2009, 08:34 AM	#10 (permalink)
leftybowler22 1st Gear Member Join Date: Nov 2008 Location: East Bethel, MN Posts: 169	Re: TRX70 Tranny knocking??? And on that note, would a xr50 clutch assembly bolt right on, I have an extra one of those also?

05-24-2009, 08:51 AM	#11 (permalink)
Grafixxs Old Fart Join Date: Apr 2007 Location: Marshall,MI Posts: 1,945 My Mood:	Re: TRX70 Tranny knocking??? Good question... Im thinking parts from it will work but I think the spline might be different, could be wrong tho.

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