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Thanks gyro. Glad to hear of your progress. I plan to order a SS brake cable, but have all the other parts you listed on order to ship complete when the bar is in. With the CB300F handlebar rolled back to clear the windscreen does it feel comfortable to you? If not I may still be able to cancel that Item and order one of the other bars you are trying. Please advise? Thanks.
 

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Thanks gyro. Glad to hear of your progress. I plan to order a SS brake cable, but have all the other parts you listed on order to ship complete when the bar is in. With the CB300F handlebar rolled back to clear the windscreen does it feel comfortable to you? If not I may still be able to cancel that Item and order one of the other bars you are trying. Please advise? Thanks.
These handlebars are about one inch higher than my helibars. that makes them 2 1/2" - 3" higher than stock, depending on how they are adjusted. The pullback is around 3.5". Helibars have 4.5" pullback. I want more pullback so I'm ordering emgo black wide magna bend with 6.5" pullback from amazon, these bars are 2" wider than 300f bars so I hope I can cut a little off each end. I still have to bleed the brakes and put on the middle cowl before I can ride.
 

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Today I cut off the two tabs at the top of the windscreen. In my previous photos they look like they stick straight out, but of course they are angled down. The windscreen looks good, like they were never there. Next I raised the bars to the higher position shown In my photo and the bars clear the windscreen now. Next I installed my lower seat (stock with 1/2" added padding) and the feel was very comfortable with a little bend in the elbow. I would be very happy with this, but my normal seat is 1 1/2" higher and my arms are straight with this seat. I really prefer a higher seat height than the stock honda seat. Also my rear shock is set at it's stiffest setting and the extra padding really helps on rough roads. I'm still waiting on two different handlebars to try. One will be here tomorrow with 2" higher rise. The brake hose probably won't reach on that one. Next week the second one will arrive with 1" higher rise and 3" more pullback, I"m expecting this one to fit me good. The brake hose should work on that with no problem.
 

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Thanks again gyro. That makes me feel it will work fine for me. I have the zero gravity sport touring windscreen which is taller but narrower by not having the tabs at the top. I will just add the cb300f longer brake cable to my order and wait for all my parts to arrive.
 

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Cb300f taller handlebars

Wanting a more upright riding position than the CBR250R offers I tried Helibars which were a good improvement but still not what I was looking for. Since the new CB300f has the upright riding position I was looking for I was planning to buy one next year. All I really need though was the top fork bridge, cables, brake hose, and the handlebars.

Now I have the straight upright riding position similar to many of the new adventure-sport bikes on the market.


I also won't have to buy that new BMW S1000XR, that will save me $16,000 right there.

The CB300F handlebars are 27" wide and the ends have a 3" pullback compared to the CBR250Rs 25" width and 4.5" pullback clipons. I wanted more pullback than the CB300 handlebars had, so I tried a couple of different aftermarket handlebars with no luck. I decided to bend the CB300 handlebars myself and now I have the 4.5" pullback I wanted and also the 25" width, same as stock CBR250.

Now the windscreen

The stock windscreen is not very effective when you are sitting straight up. The windscreen on bikes with this riding position are a lot more vertical. The front brake master cylinder hits the top corner of the windscreen, so a little trimming was in order. Now there are a lot of different shapes that can be done, round top, tombstone, fly-screen with more of a higher curve, even a Bart Simpson haircut style. Lots of possibilities here.
I went with cutting the corners at a 45 degree angle for now just to start the Bart haircut and make room for the stock CB300 mirrors that I plan to install on the handlebars.

I raised the triple trees up one inch on the fork tubes. Now the bike leans over way too much on the side stand. A quick parts check shows the CBR250, CBR300, and CB300 all use the same side stand, so I added a 1/2" to the bottom of my stand, and now it sits normal. (Edit. Lowered triple tree from 1" to 1/2 inch on fork tube because clutch cable was too tight at steering lock.)

About a year and a half ago I injured my left knee and it still bothers me occasionally. After riding about 30 minutes it aches and goes numb. To help with the problem I added 1.5" more padding to the seat and Buell 1" lower footpegs, which when installed on this motorcycle are actually 1.5" lower than stock footpegs. between the seat and the foot pegs that's 3' more legroom which really helps my knee. The Buell footpegs ($30) are not a direct fit, You have to make them fit. Knightdesigns.com makes 1' lower footpegs ($110-$120) specifically for the CBR250.
 

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I sat on a CB300F the other day and started wondering if something like this might be possible. I am glad to see that it is and that someone has already figured out the details. Thanks!

As MotoMike noted earlier in the thread, the CBR250R and CB300F have different steering stems. It looks like the CBR300R still uses the same steering stem as the CBR250R though. Does anyone know what is unique about the steering stem used on the CB300F? I am just wondering if the differences are relevant in anyway to this conversion or not...
 

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Well it is almost spring and today my garage was almost 40 deg. so I finally installed my cb300f handlebar set-up. It took me the whole afternoon. Bleeding front brake without proper bleeder took forever. My setup is like Gyrotumbler's except I kept the stock throttle cables rerouted to the back of the forks. I moved my forks down lifting the front end about .75 inches. I have the ZG sport touring windscreen and at full lock the master cylinder touches the screen but not a problem. thumbs and bars do not hit tank. Set up feels about perfect. I also have the Saddleman tech seat, Racetech front suspension and R6 rear shock set up. Still too much snow and cinders to test ride. I can hardly wait. It should be sweet. I will probably alter my kickstand too. It definitely leans too hard now. I removed my mirrors since I know what my shoulders look like and I use a handlebar mounted dual sport type mirror now. I may add another one to the left side too. I'll post pics and a ride report as soon as the weather and roads improve.
 

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I just completed my CB300F handlebar installation over the weekend. This thread was a very helpful guide. I used the same parts and followed the same steps as gyrotumbler for the most part. One exception is that I made holes in the handlebars for the switch assembly locating pins instead of filing off their locating pins. I used the alignment dots on the CB300F handlebars to locate the levers and transferred the lever alignment dot to switch hole offsets from the CBR250R clip ons to locate the switch assemblies.

I have some handlebar lever mount mirrors on order. The stock ones are still sufficient after the conversion, but ideally I would like to have them a bit higher while they are adjusted to their widest spread. Now I have another factor in the mirror adjustment compromise (my previous preferred position now puts my handlebars and knuckles in the lower quadrant of the mirror, etc). I am anticipating that the higher position of the handlebar lever mount mirrors will help with that.

I've been out on a couple rides so far and I am very happy the outcome. Thanks again for doing the homework on this!





 

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^ What a gorgeous bike! I envy the color. What windscreen have you installed? And it looks like you have some kind of luggage on the back...what would that be?

You did a great job with the handlebar installation - looks completely OEM. Did you have to use longer cables and hoses?
 

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Thanks! That is a Honda color - Silverstone metallic. It was a color option on the S2000, Insight, etc.

I used the CB300F cables, brake line, etc that are listed in gyrotumbler’s earlier post in this thread.

That is the stock windscreen, I just cut it down a bit.

And that is a Ventura rack and their Aero-Delta pack. They have other racks and luggage which interchange quickly. For example, I also have their smaller sport rack / pack that can be swapped on in about a minute.
 

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I have just ordered all the parts listed by gyrotumbler. I am sure I will need some help putting this all together as installing my Helibars bars were about as complicated as I have done before.

I do have a question of gyrotumbler, as to exactly how did you bend the new handle bar? Did you apply heat to it?

I will print this thread for reference when I start the install, but do any of you have anything else to add for a novice?

I am just hoping for a more upright riding position.

Thanks,
Bent
 

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I (not by myself) have installed the CB300F bars. I have ridden it about 100 miles and enjoyed the ride so much more than before. Yes, I think I am sitting up straight. I had Helibars on the bike for last about 2 years. This was a much more drastic change vs the stock bars to the Helibars.

I have ABS brakes and was not able to use the 45125-K33-701 HOSE, FR. BRAKE from the CB300F. There does not seem to be a replacement line I can use and I really don't think one is needed. If someone comes up with one, please post it.

I would encourage the next person to go ahead and order (Two) 90107-MBG-000 BOLT, ONE-WAY (8MM) to secure the LOCK SET. I just used bolts that gyrotumbler gave the specs to.

I bent the CB300F bars quite a bit, both up and back. The position has my hands turning out and up (if I am saying that correctly). It feels a little strange, but I have adapted to it already. It does not interfere with controlling the bike at all.

I still have some finishing touches to do. Like trimming the wind screen so it looks OK. While I was at it, I put on a 15t sprocket (like it just fine) and heated grips (not that time of year to test them) that I had purchased over a year ago.

I really want to thank all those (gyrotumbler, Pro, PSUrider and mrmunsell) (in that order) who pioneered this. You all have made my riding more enjoyable.

Bent
2011 CBR250RA with 16,000 miles.
 

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Exactly the forum I was lookimg for. I too would like to sit up more straight. So for you guys who has tried both Helibars and CB300F handlebars, would you recommend to go directly to the CB300F set-up? Worth the extra work needed?
Bent, since I have ABS on my bike, are you saying I could keep the front brakes hose as is, and wouldn't have to bleed the brakes?
Finally any of you interested in selling his Helibars? Or rent them so I can try (just kidding)? :)

Thanks all for sharing that info.
 

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ALach,

I would not go with Helibars, if you are wanting to sit up right. While Helibars were better than stock, they will leave you wanting more, a lot more. I am glad I put them on when I did, but the better solution using the CB300f bars was not available at the time.

As far as the ABS brake lines, I do not think I will need to change to a longer line. But if someone comes up with the right fit for a longer line I would look into going that route.

I still have not cut back enough of my windshield to be able to turn the handlebars all the way to each side. I will work on doing that in a few weeks. I have a Tyga Touring windscreen on top of my stock windshield and the bars will hit the Tyga also. So I am moving slowly seeing if I really want to cut in to the Tyga windscreen also.

I may have more to say when I get the project finished in a few weeks. In the mean time, I have ridden some 300 miles using the new bars and hope to another 150 tomorrow.

Good luck with your project.

Bent
 

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Bent,
Thanks very much for your advice. I'll go that way too. Being from Canada I might have to shop around a bit more to find a good price though. Did I miss something or nobody mentioned the best solution to fill the gap around the ignition?
 

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Bent,
Thanks very much for your advice. I'll go that way too. Being from Canada I might have to shop around a bit more to find a good price though. Did I miss something or nobody mentioned the best solution to fill the gap around the ignition?
The gap around the ignition is for cooling reasons
0:)
The gab around the ignition lock does not look (to me) so bad, on this pic


Black aquarium silcone, maybe?

I would like to have this ignition lock with the lock for the keyhole.
On 2013 CBR150, they had it. And a bit smaller as on this CB300

 

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The gab around the ignition lock does not look (to me) so bad...
Yeah, I agree... which is why its been low on my todo list.

One idea that came to mind was black weatherstripping. I had a little excess garage door weatherstripping lying around, so I gave that a try. The lip that is intended to seal against the ground is tapered and the leading edge is about the same width as the gap.

So I cut off the leading edge and pressed it into place. The wider the strip, the thicker the backside will be... so the tighter the fit and the more difficult the installation. After a little trial and error, I ended up going with a width of about 10 mm. That results in a back edge that is about twice the thickness of the leading edge. That made it a good tight press fit that was still not too hard to install without damaging the weatherstripping.

Given its intended application, I think it should hold up to the elements well... just not sure how well it stay in place. Time will tell. If that turns out to a problem, a variation of the idea might be to buy some of that adhesive backed weatherstripped... if you can find it in a similar thickness.





 
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