Help me verify the right sprockets & chain 4 my RoketaDB

kens97sto171 · 05-27-2007, 08:01 PM

Hey, guys I have an 06 Roketa DB07. I have read all the posts I could find on changing sprockets and chain, to get better highway gearing... I just wanted to VERIFY that I had it right. there were several posts about certain front sprocket NOT working... so just checkin.
This is what I need to get from JT Sprockets.. RIGHT??

Front Sprocket P/N JTF1324.13
Rear Sprocket P/N JTR279.33
= Ratio 33/13 = 2.5384

Then also need a 520 Chain with about 110 links.

I have already opened up the exhaust, and did the carb mod.. Got lots more power in the mid range, but still wont pull much as the revs climb to the high end.

Thanks for all the help...

Ken

czowner · 05-28-2007, 04:28 AM

Ken,
I've had a look at my gear ratio chart (I think I found it on the JT web site) and I think your choice of 13/33 is a little high, in my opinion a 34 tooth rear
would be better.
Don't expect much in the way of top end power, it's not the nature of the beast, enjoy the midrange.

Jonathan.

kens97sto171 · 05-28-2007, 12:26 PM

Thanks for the suggestion. I will try that. The engine has great mid range power, but as the revs climb it does not seem to want to go as high as it should or pull as it should. I suspect the car is too small, or exhaust is restricted. But I think if I could raise the overall ratio the bike would be better riding in general.. I do almost NO offroading.

Thanks again.

Ken

Ferrit · 05-29-2007, 05:44 AM

13/33 is a bit high IMO but for street use only it would work. Just push off a bit from a standing start to help save the clutch.

05-27-2007, 08:01 PM	#1
kens97sto171 Join Date: Mar 2007 Posts: 193	Help me verify the right sprockets & chain 4 my RoketaDB Hey, guys I have an 06 Roketa DB07. I have read all the posts I could find on changing sprockets and chain, to get better highway gearing... I just wanted to VERIFY that I had it right. there were several posts about certain front sprocket NOT working... so just checkin. This is what I need to get from JT Sprockets.. RIGHT?? Front Sprocket P/N JTF1324.13 Rear Sprocket P/N JTR279.33 = Ratio 33/13 = 2.5384 Then also need a 520 Chain with about 110 links. I have already opened up the exhaust, and did the carb mod.. Got lots more power in the mid range, but still wont pull much as the revs climb to the high end. Thanks for all the help... Ken
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05-28-2007, 04:28 AM	#2
czowner Join Date: Sep 2006 Location: North East England Posts: 313	Ken, I've had a look at my gear ratio chart (I think I found it on the JT web site) and I think your choice of 13/33 is a little high, in my opinion a 34 tooth rear would be better. Don't expect much in the way of top end power, it's not the nature of the beast, enjoy the midrange. Jonathan.
	0

05-28-2007, 12:26 PM	#3
kens97sto171 Join Date: Mar 2007 Posts: 193	Thanks for the suggestion. I will try that. The engine has great mid range power, but as the revs climb it does not seem to want to go as high as it should or pull as it should. I suspect the car is too small, or exhaust is restricted. But I think if I could raise the overall ratio the bike would be better riding in general.. I do almost NO offroading. Thanks again. Ken
	0

05-29-2007, 05:44 AM	#4
Ferrit Join Date: Nov 2006 Location: Lawrenceburg, KY Posts: 178	13/33 is a bit high IMO but for street use only it would work. Just push off a bit from a standing start to help save the clutch.
	0