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Search: Posts Made By: kfox
Forum: Site News & Feedback   04-03-2019, 06:12 PM
Replies: 145
Views: 21,192
Posted By kfox
Not the only. I race my cbr250r in CMRA. And...

Not the only. I race my cbr250r in CMRA. And there's a new novice racing one also.https://uploads.tapatalk-cdn.com/20190403/4c4ddd5fbc35d868e222c189b5df1969.jpg

Sent from my Pixel 3 using Tapatalk
Forum: CBR250 Appearance and Modifications   09-06-2017, 06:46 PM
Replies: 13
Views: 2,839
Posted By kfox
I've raced a bunch of different tire brands and...

I've raced a bunch of different tire brands and sizes, and finally settled on the Pirelli GP3 tires (rear 115/70-R17, front 100/70-R17). The bike handles like a dream with almost any tire (as long...
Forum: CBR250 Performance   08-28-2017, 03:22 PM
Replies: 26
Views: 12,127
Posted By kfox
I did a little testing on the back roads around...

I did a little testing on the back roads around my house, but there's no way to replicate the track. It was fine during testing. It only started sticking "open" after a few laps of hard downshifts....
Forum: CBR250 Performance   06-01-2017, 12:30 PM
Replies: 26
Views: 12,127
Posted By kfox
I installed the Takegawa slipper using the...

I installed the Takegawa slipper using the Japanese instructions. They have good pictures, so I'm pretty sure I got it right. However, first time using it at the track, the slipper stuck open and...
Forum: CBR250 Performance   04-26-2017, 05:34 PM
Replies: 26
Views: 12,127
Posted By kfox
Has anyone installed the Takegawa slipper clutch...

Has anyone installed the Takegawa slipper clutch on a CBR250R? The instructions are in Japanese - anyone know where to find English instructions? Thanks in advance for any help.
Forum: CBR250 New Member Introductions   11-04-2016, 03:33 PM
Replies: 3
Views: 593
Posted By kfox
I've been looking for a 415 or 420 front sprocket...

I've been looking for a 415 or 420 front sprocket for a while. No luck. Quite a few places to get the rear sprocket and chains. Anyone?
Forum: CBR250 Performance   08-29-2016, 04:27 PM
Replies: 13
Views: 3,476
Posted By kfox
thefeev - that's the best explanation I've seen...

thefeev - that's the best explanation I've seen yet. Although I haven't seen any club racers use it at the track - would be very difficult as we are constantly adjust tire pressures to match the...
Forum: CBR250 Performance   08-24-2016, 01:07 PM
Replies: 35
Views: 6,719
Posted By kfox
Kiwi - Thanks for the comments. I don't know the...

Kiwi - Thanks for the comments. I don't know the speeds, as I don't look at the speedo (which would be way off, in any event) and I don't have a GPS to tell me. Sorry.

Your formula 3 sounds like...
Forum: CBR250 Performance   08-23-2016, 03:07 PM
Replies: 35
Views: 6,719
Posted By kfox
Race report from CMRA Round 7 in Cresson (running...

Race report from CMRA Round 7 in Cresson (running CCW) this past weekend.

It was raining all through the Saturday sprints. I lowsided in the third turn of the first lap of my first race -...
Forum: CBR250 Performance   08-23-2016, 02:48 PM
Replies: 35
Views: 6,719
Posted By kfox
Yep, that where I got the conversion. Just...

Yep, that where I got the conversion. Just double checking to see if that looks right to others.
Forum: CBR250 Performance   08-17-2016, 12:56 PM
Replies: 35
Views: 6,719
Posted By kfox
I just found this - SUNSTAR : Front Sprocket...

I just found this - SUNSTAR : Front Sprocket [004-17] (http://japan.webike.net/products/22768347.html).

What do you think? I think that a 15/34 setup in 520 chain converts to about 18/41 in a 415...
Forum: CBR250 Performance   08-10-2016, 10:53 AM
Replies: 35
Views: 6,719
Posted By kfox
I'm in for 3 or 4 of those - replacements,...

I'm in for 3 or 4 of those - replacements, because I doubt I'll find them again once they wear out. I assume that is steel front, aluminum rear, with non-o-ring chain.
Forum: CBR250 Performance   08-09-2016, 05:03 PM
Replies: 2
Views: 1,095
Posted By kfox
I would be in for a couple of sets - making sure...

I would be in for a couple of sets - making sure I have replacements as they wear out. Let me know if you find anything. I've come up dry. The closest I've come is Kinzer Naylor Racing, who said...
Forum: CBR250 Performance   08-05-2016, 12:10 PM
Replies: 28
Views: 5,464
Posted By kfox
Hey Cameron - Thanks for the update. It looks...

Hey Cameron - Thanks for the update. It looks like we'll be running very similar bikes, except I think Ari's A engine was a bit more built than the B I bought off him. Also, I'm running a different...
Forum: CBR250 Performance   07-26-2016, 05:00 PM
Replies: 28
Views: 5,464
Posted By kfox
Here's a video of race #2...

Here's a video of race #2 (https://www.cbr250.net/forum/usertag.php?do=list&action=hash&hash=2) (my first race at Cresson), with the slide, pogoing and run off. No videos of the other races - I was...
Forum: CBR250 Performance   07-26-2016, 03:59 PM
Replies: 28
Views: 5,464
Posted By kfox
I've finally raced on the Bridgestone GP3s, and...

I've finally raced on the Bridgestone GP3s, and they are very promising. Round 6 of CMRA was at Cresson this last weekend. I practiced on the WeeBR Friday afternoon. My suspension guy, Roger...
Forum: CBR250 Performance   07-08-2016, 02:25 PM
Replies: 28
Views: 5,464
Posted By kfox
Would love that! Tell me where you ride - all...

Would love that! Tell me where you ride - all the tracks around me (other than COTA, which is silly expensive and only available for track days, not racing) are mainly used for car racing, so they...
Forum: CBR250 Service and Maintenance   07-08-2016, 02:17 PM
Replies: 10
Views: 2,593
Posted By kfox
I change mine all the time. First time is a bit...

I change mine all the time. First time is a bit of work as you get used to the tricks, but then its easy.

Taking the front tire off is a snap. (i) put the bike on some sort of block/lift so tire...
Forum: CBR250 Performance   07-07-2016, 03:19 PM
Replies: 13
Views: 1,798
Posted By kfox
13/36 would give great acceleration, but a lot of...

13/36 would give great acceleration, but a lot of shifting and very low top end speed. OK for road use and maybe for a very tight, short track, but limiting if there are sweepy parts or straights. ...
Forum: CBR250 Performance   07-06-2016, 01:05 PM
Replies: 28
Views: 5,464
Posted By kfox
Unfortunately, I can't enlighten you - still...

Unfortunately, I can't enlighten you - still working on my own bodhisattva transformation.


But you are correct. Every solution has issues, though. One issue with your solution (as you pointed...
Forum: CBR250 Performance   07-05-2016, 02:29 PM
Replies: 28
Views: 5,464
Posted By kfox
Spot - Welcome back to the forum! We've missed...

Spot - Welcome back to the forum! We've missed your posts.


I've thought about simply using washers at the top of the shock mount, but was worried about creating some flex. Maybe too cautious. ...
Forum: CBR250 New Member Introductions   07-05-2016, 02:22 PM
Replies: 4
Views: 468
Posted By kfox
Welcome! You should take the wee beast to MSR...

Welcome! You should take the wee beast to MSR Houston and get a little track time! It can't be that far away from you. See ridesmart.info. There's a weekend coming up on July 30-31. Let me know...
Forum: CBR250 Performance   07-05-2016, 02:16 PM
Replies: 35
Views: 6,719
Posted By kfox
******************** - because of your post I...

******************** - because of your post I tried a 15/43 and I could wheelie the bike in pretty much any gear. Had to shift out of first at about 3 mph, but otherwise was fun. >:)
Forum: CBR250 Performance   07-05-2016, 02:08 PM
Replies: 28
Views: 5,464
Posted By kfox
Yep, I'm running the 90 / 120s on the stock OEM...

Yep, I'm running the 90 / 120s on the stock OEM rims. They are slightly wide and look a bit funny if you look closely. However, they seem to operate without any issues. Ari Henning ran them all...
Forum: CBR250 Performance   07-02-2016, 12:43 PM
Replies: 13
Views: 1,798
Posted By kfox
PMP Sprockets - PMPsprockets Motorcycle Sprockets...

PMP Sprockets - PMPsprockets Motorcycle Sprockets Custom motorcycle sprockets (http://pmpsprockets.com/). Their web site isn't the best, but if you call them they are extremely knowledgeable and...
Showing results 1 to 25 of 234

 
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