Mrs. 2LZ TT250. Into the Fire.... - Page 9

SeerAtlas · 07-25-2016, 05:28 PM

Quote:

Originally Posted by darmst6829

Will a TT250 pull 17 43 gearing?

in 4th gear maybe :(
seriously, thats pretty high

2LZ · 07-25-2016, 05:37 PM

I'll have to check to see what I have on Q. I accidently over-geared him, with some performance mods (jetting and exhaust) hoping for a screaming top speed. I went a little too tall and I was losing speed in 5th on just the slightest uphills with my 200 pound a$$ on it. I backed off a little and found the perfect combo. It revs higher be held a higher top speed. I'll post what I find.... Same gear ratio should work on a TT with some minor mods.

darmst6829 · 07-25-2016, 05:56 PM

Quote:

Originally Posted by pcspecialist

Why would you want to? Even 17/45 is a tad bit too tall.

I don't want to. Looking for gearing feed back. Over gearing is hard on equipment.

kohburn · 07-25-2016, 06:01 PM

Quote:

Originally Posted by pcspecialist

Why would you want to? Even 17/45 is a tad bit too tall.

on the hawk. but based on the rpm you stated you had with 17/45 the TT250 gears are different. with 17/47 its hitting 63mph at just under 8000rpm.

based on that the tt250 with 17/43 will be lower than a hawk with 16/45 - with 17/43 the TT should sit at about 7500rpm at 65mph

darmst6829 · 07-25-2016, 08:58 PM

I looked today and found that I have a 17 50 combo as standard and the motorcycle will do 50mph tops. A cruise speed of 50 would be OK with WOT of 60 would be better. Possible?

celswick13 · 07-26-2016, 12:11 AM

Did you notice any exhaust leak where the header goes into the engine?
I have the same exhaust and notice/hear a small exhaust leak there.
The new exhaust Od is around 1.5mm smaller than the OEM where it fits into the engine.
I cut one of the bolt holes the same way you did, but I am going to try doing that to the second as well.

Edit:
Never mind, I found my issue.
TWO seal pads (as listed on csc) that were installed wrong.

2LZ · 07-26-2016, 10:31 AM

The pod filter finally arrived! :-)

I went with the Nibbi filter for a couple reasons. Mainly because I knew the frame may interfere and I wanted the longer bent neck on it. Also, for our riding purposes, (90% pavement, 10% gravel road), I prefer the K&N style. Besides, it says "racing" so it has to make it faster, right!? ;-) Anyway, the filter seems of a very good quality. So far, I'm happy with it. Also, I did the math and it is within one square inch of the stock paper filter but is by far a more open breather. After fitting, I hit it with a light coating of K&N filter oil and then did the final mounting.

https://www.amazon.com/Racing-Perfor...bi+42mm+filter

The filter fit almost too perfectly...as it was damn tight to the frame rail and it really only was able to be mounted in one spot and still clear.....and it barely cleared. If I'm up-in-the-air on it later, I'll fabricate a short extension. We'll see. It looks good for now. As you can see it also clears the outer skin nicely but is protected in behind it from manzanita branches, etc...

For those who are going to be doing much more off-road than the 2LZ Family, but still want a pod filter, I'd suggest one of these type. Weldangrind really prefers the Uni-style double sock oiled foam filter like this one. Serviceable, oilable and its use in the dirtbike world is legendary. They protect very well against the finest of dust....but with no real neck, you'll need to fabricate one to extend it out a bit.

https://www.amazon.com/Filter-Cleane...ike+air+filter

kohburn · 07-26-2016, 10:39 AM

Quote:

Originally Posted by darmst6829

I looked today and found that I have a 17 50 combo as standard and the motorcycle will do 50mph tops. A cruise speed of 50 would be OK with WOT of 60 would be better. Possible?

so you took the cover off the front sprocket and counted teeth? because with the stock 17/50 (counted) I was hitting 60

2LZ · 07-26-2016, 10:46 AM

Since I got confirmation on my rear sprocket shipping (thanks kohburn!), I decided last night to take the stock sprocket off and prepare it for shipping to JT Sprockets (Bike Alert) so they can measure it out. Hopefully if they don't already have something in stock, they'll be able to make us a sprocket in a variety of tooth configurations. Fingers crossed!

Once off the rim, I got a confirmed 7mm offset. I still don't think this will cause much of a problem going to a flat sprocket, especially with the length of chain and how the countershaft sprocket wobbles on the countershaft. If it starts to cause chain wear, I'll do something else later.

The hub itself appears to be a solid (non-cush? unless the rubber is hidden inside somehwere) direct bolt hub....and looks very sturdy. The bolt stand-offs are fat and also have cast bridgework in between each one. The sprocket itself is mounted with some fat 10mm shoulder bolts that seem very dense and heavy. Not sure what grade they are but they're substantial, for sure. Hopefully we won't be seeing any sheering problems. The bolts had a blue lock-tite-type of thread lock on them.

Anyway, that's it for now.

darmst6829 · 07-26-2016, 11:51 AM

Quote:

Originally Posted by kohburn

so you took the cover off the front sprocket and counted teeth? because with the stock 17/50 (counted) I was hitting 60

Yep, 17 50.

kohburn · 07-26-2016, 12:13 PM

2LZ, while you have it apart can you measure the height from where the sprocket seats on the center hub up to the face of the center hub? I'm guessing its about 14mm.

did you see my post in the sprocket thread?
http://www.chinariders.net/showpost....7&postcount=42
http://www.chinariders.net/showpost....8&postcount=43

I think the stock offset is less aligned than flat.

2LZ · 07-26-2016, 12:16 PM

Quote:

Originally Posted by kohburn

2LZ, while you have it apart can you measure the height from where the sprocket seats on the center hub up to the face of the center hub? I'm guessing its about 14mm.

did you see my post in the sprocket thread?
http://www.chinariders.net/showpost....7&postcount=42
http://www.chinariders.net/showpost....8&postcount=43

I think the stock offset is less aligned than flat.

I'll get that measured out tonight and thanks for the heads up on your posts!

2LZ · 07-26-2016, 10:30 PM

Quote:

Originally Posted by kohburn

2LZ, while you have it apart can you measure the height from where the sprocket seats on the center hub up to the face of the center hub? I'm guessing its about 14mm.

did you see my post in the sprocket thread?
http://www.chinariders.net/showpost....7&postcount=42
http://www.chinariders.net/showpost....8&postcount=43

I think the stock offset is less aligned than flat.

Here ya go, kohburn!
You were close... 14.5. ;-)...not counting casting errors.

2LZ · 07-26-2016, 10:33 PM

...of heavy and unneeded stuff.

hertz9753 · 07-27-2016, 12:13 AM

You must be down to XR250L weight now. Do you have scale you could put the whole bike on?

07-25-2016, 05:37 PM	#122
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,092	I'll have to check to see what I have on Q. I accidently over-geared him, with some performance mods (jetting and exhaust) hoping for a screaming top speed. I went a little too tall and I was losing speed in 5th on just the slightest uphills with my 200 pound a$$ on it. I backed off a little and found the perfect combo. It revs higher be held a higher top speed. I'll post what I find.... Same gear ratio should work on a TT with some minor mods. __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350
	0

07-26-2016, 12:11 AM	#126
celswick13 Join Date: Jun 2016 Posts: 19	Did you notice any exhaust leak where the header goes into the engine? I have the same exhaust and notice/hear a small exhaust leak there. The new exhaust Od is around 1.5mm smaller than the OEM where it fits into the engine. I cut one of the bolt holes the same way you did, but I am going to try doing that to the second as well. Edit: Never mind, I found my issue. TWO seal pads (as listed on csc) that were installed wrong. Last edited by celswick13; 07-26-2016 at 02:04 AM.
	1

07-26-2016, 10:31 AM	#127
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,092	Air Filter The pod filter finally arrived! :-) I went with the Nibbi filter for a couple reasons. Mainly because I knew the frame may interfere and I wanted the longer bent neck on it. Also, for our riding purposes, (90% pavement, 10% gravel road), I prefer the K&N style. Besides, it says "racing" so it has to make it faster, right!? ;-) Anyway, the filter seems of a very good quality. So far, I'm happy with it. Also, I did the math and it is within one square inch of the stock paper filter but is by far a more open breather. After fitting, I hit it with a light coating of K&N filter oil and then did the final mounting. https://www.amazon.com/Racing-Perfor...bi+42mm+filter The filter fit almost too perfectly...as it was damn tight to the frame rail and it really only was able to be mounted in one spot and still clear.....and it barely cleared. If I'm up-in-the-air on it later, I'll fabricate a short extension. We'll see. It looks good for now. As you can see it also clears the outer skin nicely but is protected in behind it from manzanita branches, etc... For those who are going to be doing much more off-road than the 2LZ Family, but still want a pod filter, I'd suggest one of these type. Weldangrind really prefers the Uni-style double sock oiled foam filter like this one. Serviceable, oilable and its use in the dirtbike world is legendary. They protect very well against the finest of dust....but with no real neck, you'll need to fabricate one to extend it out a bit. https://www.amazon.com/Filter-Cleane...ike+air+filter __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 Last edited by 2LZ; 02-07-2018 at 12:06 PM.
	2

07-26-2016, 10:46 AM	#129
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,092	Rear Sprocket and Hub Since I got confirmation on my rear sprocket shipping (thanks kohburn!), I decided last night to take the stock sprocket off and prepare it for shipping to JT Sprockets (Bike Alert) so they can measure it out. Hopefully if they don't already have something in stock, they'll be able to make us a sprocket in a variety of tooth configurations. Fingers crossed! Once off the rim, I got a confirmed 7mm offset. I still don't think this will cause much of a problem going to a flat sprocket, especially with the length of chain and how the countershaft sprocket wobbles on the countershaft. If it starts to cause chain wear, I'll do something else later. The hub itself appears to be a solid (non-cush? unless the rubber is hidden inside somehwere) direct bolt hub....and looks very sturdy. The bolt stand-offs are fat and also have cast bridgework in between each one. The sprocket itself is mounted with some fat 10mm shoulder bolts that seem very dense and heavy. Not sure what grade they are but they're substantial, for sure. Hopefully we won't be seeing any sheering problems. The bolts had a blue lock-tite-type of thread lock on them. Anyway, that's it for now. __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 Last edited by 2LZ; 02-07-2018 at 12:06 PM.
	0

07-26-2016, 12:13 PM	#131
kohburn Join Date: Dec 2015 Location: Coastal NC Posts: 537	2LZ, while you have it apart can you measure the height from where the sprocket seats on the center hub up to the face of the center hub? I'm guessing its about 14mm. did you see my post in the sprocket thread? http://www.chinariders.net/showpost....7&postcount=42 http://www.chinariders.net/showpost....8&postcount=43 I think the stock offset is less aligned than flat. __________________ -whatever you do, just be awesome. - 2008 Kawasaki Versys - 2016 CSC TT250
	1

07-25-2016, 08:58 PM	#125
darmst6829 Join Date: May 2016 Location: Redmond WA Posts: 42	I looked today and found that I have a 17 50 combo as standard and the motorcycle will do 50mph tops. A cruise speed of 50 would be OK with WOT of 60 would be better. Possible?
	0

07-26-2016, 10:33 PM	#134
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,092	15.6 lbs... ...of heavy and unneeded stuff. __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 Last edited by 2LZ; 02-07-2018 at 12:06 PM.
	4

07-27-2016, 12:13 AM	#135
hertz9753 Join Date: May 2016 Location: Bismarck, ND Posts: 868	You must be down to XR250L weight now. Do you have scale you could put the whole bike on? __________________ 2015 and 3/4 RPS Hawk 250. Most people would call it a 2016 but the MCO didn't.
	0