Megelli 250r - Page 2

FastDoc · 01-21-2011, 11:58 AM

The CBR looks great but the Ninja would leave it behind as if it were pulling a boat anchor. The Ninja is the same or less money so it's a no brainer to me. The caveat is the CBR can be had with ABS.

I had a 2008 Ninja250R for a season and I really liked that bike. If it were not for the fact I just bought it to repair and sell for a profit I'd have kept it. Plus if it were any color but that Kawasaki green which I don't care for, especially on a streetbike. :roll:

My girlfriend at the time and I rode that bike 5,000 miles in one summer.

recracer · 02-05-2011, 07:49 PM

With some other projects on hold i decided to try a gear change on the megelli . I took some measurements and came up with Jtr819 sprockets as a fit . http://www.jtsprockets.com/52.0.html...el_uid=1612&p= However 41t is all that is listed in this sprocket . i want to try a bigger change . found jtr1825 only thing is center bore is smaller by 4mm , but sizes from 37 to 48 teeth are available . http://www.jtsprockets.com/52.0.html...el_uid=5723&p=[url] I found and bought a 48 tooth on ebay . so when i get it ,I'll be looking to see if opening up the center hole or turning down the wheel ,is a better way to go to give myself more options . this is a chart to show the ratio difference

FastDoc · 02-05-2011, 07:56 PM

Dont change anything on the wheel. Only work on the procket. I'd use a machine shop if you could. The steel the sprockets are made of is very strong and difficult to cut/grind.

recracer · 02-05-2011, 08:27 PM

Quote:

Originally Posted by FastDoc

Dont change anything on the wheel. Only work on the procket. I'd use a machine shop if you could. The steel the sprockets are made of is very strong and difficult to cut/grind.

Once i have the sprocket in hand and the wheel off , I'll be able to see whats there . I could chuck the sprocket or wheel on a lathe at work . actually just the cushy drive part not the whole wheel

FastDoc · 02-05-2011, 08:29 PM

If you have access to a lathe and know how to use it (I sure don't :roll: ) that would be your best bet. Considering the sprocket is the cheaper and more easily replaced part that's the one I would modify.

recracer · 02-08-2011, 10:53 PM

Sprocket in hand . I have to say I'm inclined to machine the sprocket hub and not the sprocket , doing so gives me the easy option of the jtr1825 lineup ( Rear sprocket available in: 37, 38, 40, 41, 42, 45, 46, 47, 48 teeth ) even the 37t OE size is possible in JT's lineup and i wouldn't have to machine each size to try it . megelli only has a 39 or 40t sprocket as options . here are some photo's . If there's something important I'm missing feel free to yell .

FastDoc · 02-08-2011, 11:27 PM

I think either would work but I'd still cut the sprocket rather than the bike part. The sprocket is cheap and easy to replace, the hub is not. Just my 2 cents.

Weldangrind · 02-09-2011, 12:46 AM

After seeing that list of available sprockets, I'd machine the hub. Before you do, have you identified which hub yours is based on?

recracer · 02-09-2011, 12:54 AM

Seems to be suzuki bolt pattern . jtr819 is a close fit ,but harder to find and fewer sizes .

80-81 gs250 Rear sprocket available in: 37, 39, 46, 47 teeth . Bolt holes would need to be opened to 10.5

SpudRider · 02-09-2011, 02:01 AM

I would definitely machine the hub, Racer.

You only need to remove 2mm from the hub's radius, and you will have a much larger selection of sprockets to choose from.

Spud

Cal25 · 02-09-2011, 08:33 AM

Looks easier to me to chuck up the hub and cut it down to fit the new sprocket. Maybe use an engraver on the hub to mark the new sprocket model # so it will be easier for you or the next owner to ID when it comes time to change the sprocket.

Weldangrind · 02-09-2011, 10:28 AM

Quote:

Originally Posted by Cal25

Looks easier to me to chuck up the hub and cut it down to fit the new sprocket. Maybe use an engraver on the hub to mark the new sprocket model # so it will be easier for you or the next owner to ID when it comes time to change the sprocket.

Excellent logic.

FastDoc · 02-09-2011, 11:33 AM

I have been soundly outvoted!

Anyway, make it fit and let us know how it works!

recracer · 02-09-2011, 11:50 AM

Machining done Cell phone photos .

FastDoc · 02-09-2011, 11:53 AM

Good pics and good job. i envy your skills and access to the equipment.

01-21-2011, 11:58 AM	#16
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	The CBR looks great but the Ninja would leave it behind as if it were pulling a boat anchor. The Ninja is the same or less money so it's a no brainer to me. The caveat is the CBR can be had with ABS. I had a 2008 Ninja250R for a season and I really liked that bike. If it were not for the fact I just bought it to repair and sell for a profit I'd have kept it. Plus if it were any color but that Kawasaki green which I don't care for, especially on a streetbike. :roll: My girlfriend at the time and I rode that bike 5,000 miles in one summer. __________________ Happy to serve.
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02-05-2011, 07:56 PM	#18
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	Dont change anything on the wheel. Only work on the procket. I'd use a machine shop if you could. The steel the sprockets are made of is very strong and difficult to cut/grind. __________________ Happy to serve.
	0

02-05-2011, 08:29 PM	#20
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	If you have access to a lathe and know how to use it (I sure don't :roll: ) that would be your best bet. Considering the sprocket is the cheaper and more easily replaced part that's the one I would modify. __________________ Happy to serve.
	0

02-08-2011, 11:27 PM	#22
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	I think either would work but I'd still cut the sprocket rather than the bike part. The sprocket is cheap and easy to replace, the hub is not. Just my 2 cents. __________________ Happy to serve.
	0

02-09-2011, 12:46 AM	#23
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	After seeing that list of available sprockets, I'd machine the hub. Before you do, have you identified which hub yours is based on? __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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02-05-2011, 07:49 PM	#17
recracer Join Date: Jul 2009 Location: Charles Town W.V. Posts: 849	With some other projects on hold i decided to try a gear change on the megelli . I took some measurements and came up with Jtr819 sprockets as a fit . http://www.jtsprockets.com/52.0.html...el_uid=1612&p= However 41t is all that is listed in this sprocket . i want to try a bigger change . found jtr1825 only thing is center bore is smaller by 4mm , but sizes from 37 to 48 teeth are available . http://www.jtsprockets.com/52.0.html...el_uid=5723&p=[url] I found and bought a 48 tooth on ebay . so when i get it ,I'll be looking to see if opening up the center hole or turning down the wheel ,is a better way to go to give myself more options . this is a chart to show the ratio difference
	0

02-08-2011, 10:53 PM	#21
recracer Join Date: Jul 2009 Location: Charles Town W.V. Posts: 849	Sprocket in hand . I have to say I'm inclined to machine the sprocket hub and not the sprocket , doing so gives me the easy option of the jtr1825 lineup ( Rear sprocket available in: 37, 38, 40, 41, 42, 45, 46, 47, 48 teeth ) even the 37t OE size is possible in JT's lineup and i wouldn't have to machine each size to try it . megelli only has a 39 or 40t sprocket as options . here are some photo's . If there's something important I'm missing feel free to yell .
	0

02-09-2011, 12:54 AM	#24
recracer Join Date: Jul 2009 Location: Charles Town W.V. Posts: 849	Seems to be suzuki bolt pattern . jtr819 is a close fit ,but harder to find and fewer sizes . 80-81 gs250 Rear sprocket available in: 37, 39, 46, 47 teeth . Bolt holes would need to be opened to 10.5
	0

02-09-2011, 02:01 AM	#25
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	I would definitely machine the hub, Racer. You only need to remove 2mm from the hub's radius, and you will have a much larger selection of sprockets to choose from. Spud __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
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02-09-2011, 08:33 AM	#26
Cal25 Join Date: Feb 2008 Location: Terrell and Grapevine Tx. Posts: 1,585	Looks easier to me to chuck up the hub and cut it down to fit the new sprocket. Maybe use an engraver on the hub to mark the new sprocket model # so it will be easier for you or the next owner to ID when it comes time to change the sprocket.
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02-09-2011, 11:33 AM	#28
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	I have been soundly outvoted! Anyway, make it fit and let us know how it works! __________________ Happy to serve.
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02-09-2011, 11:50 AM	#29
recracer Join Date: Jul 2009 Location: Charles Town W.V. Posts: 849	Machining done Cell phone photos .
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02-09-2011, 11:53 AM	#30
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	Good pics and good job. i envy your skills and access to the equipment. __________________ Happy to serve.
	0