Topic: 750F thread?

[wohali]

While we're on the topic of the airbox...in Mark's (Hondaman's) book, he suggests adding a few holes to the airbox. Has anyone else tested this, done dyno results, and compared?

[TwoTired]

Are you spinning at higher than normal red line?  Bigger cam/valves?

[cobrajunkie]

Check the link in my last post then, because you will find filtered stacks...

Yup.  Following that thread closely.  Thanks man.  I know the purist may have a hard time with this, (trust me, I have a fake car) but a good looking individual stack with good filtering (because it performs better than pods) is what most would might strive for.  I just want something that looks like this   




or how about a set of webers for your CB.  Talk about hard to tune..





 

[MCRider]

oops gotta take issue with the Webers comment. i had a set on 750cc size motor. Very easy to dial in. Replaceable venturis. All the jets are accessable thru a cap on top. Ran and idled very nicely.

[Flying J]

Im so lost between the anti pod thread and the 750F thread i dont know which is which. Neither are on topic. Anyway, im going to run v-stacks for shows and the anti pod when i ride. But thats on my 550.

[Mandic]

Trying to get this back on topic a bit, I took my 77F out for a ride at sunset and snapped some photos in an abandoned lot. 

Ignore my pods by the way and the fact that I really need to get the badges back on her:

[wohali]

Beautiful, Mandic!

TT: No, and I'll take it by your description that it's not worth it.... wasn't planning on making that modification anyway. Only just learned that #3 was never firing due to a bad spark plug cap; I'm sure the extra power from that fourth cylinder will make the bike get up and go compared to what I've been used to for 5 years!

[cobrajunkie]

oops gotta take issue with the Webers comment. i had a set on 750cc size motor. Very easy to dial in. Replaceable venturis. All the jets are accessable thru a cap on top. Ran and idled very nicely.

 


You MUST have been running PODs.   

[Freaky1]

I had oiled UNI pods on The Beast last summer and I'll say those suck! If one is unevenly oiled then that carb will run differently, too frustrating plus that oil is a pain in the butt to get off anything. Just to point out about TT's post, clearly he pointed out that the motor is stock and old, non accelerator pump models. Mine will not be stock this time and I'm going back to the stock carbs, with a accel pump. I also am more go than show, the best looking bike in the parking lot still looks like crap when it runs like crap or is sitting on the side of the road.

On to better subjects, I got a bunch of work done this last weekend and rather than post all the details here, check out the build thread. I did the carbs, finished the mock up of the rear fender, and figured out where and how I'm mounting the pegs.

[Mandic]

Has anyone swapped to a different master cylinder?  I've been noticing a spongey brake feel since I got my bike back together.  I am going to give another bleed a shot but after I vacuum bled 2 bottles of brake fluid through it, it seemed pretty darn good.  However at its best it has never felt great in my opinion.  So I am thinking maybe swapping to a new master cylinder is in order. 

I foresee a swap to the GL1000 front end in the future(not necessarily the near future) so wondering if they have the same size caliper pistons as our bikes?  Don't want to invest in a new master cylinder that won't work with a later change.

[TwoTired]

Are you still using the original fatigued rubber brake lines?

[wohali]

TT, whose replacement brake lines do you recommend for an F3?

[Tugboat]

I'd highly recommend @pampadori (Slingshot Cycles) for brake lines. He's a member and does really good work. I got SS lines for my KZ and new rubber ones for my 750F - made a HUGE difference.

Here's the forum link:
http://forums.sohc4.net/index.php?topic=54790.0

or his website:
http://www.slingshot-cycles.com/

[Flying J]

The guy in the for sale area has had good reviews on his cables. I just put some together from dennis kirk or bike bandit, Before that guy was around.

[Dick Danger]

Trying to get this back on topic a bit, I took my 77F out for a ride at sunset and snapped some photos in an abandoned lot. 

Ignore my pods by the way and the fact that I really need to get the badges back on her:

Bike looks great Mandic!  Is that a mac pipe?  Any issues with your pods?  lol   

[wohali]

Thanks, just ordered from @pampadori, looking forward to it. Now to decide if I move to DOT4 from DOT3... muhahahahah...

[Mandic]

I have custom made stainless brake lines.  I had them made by a local hydraulic hose company back in Pennsylvania.  My main one from my master cylinder to the "splitter block" is too long. It was copied from the factory line with the factory bars, I have clubmans.

And I'd run DOT4 if you can flush out all the old DOT3.  It won't hurt anything and has a higher boiling point. 

As for my exhaust, it is a factory 4-1 with a Mac Muffler.  It is too quiet and too big for my liking.  I wouldn't argue with it being on a slight bit louder, but the size is too darn big. 

[RSchaefer]

I am upgrading to the dual front brake ('75F0) and have noticed where many have suggested the need for a larger/dual brake master cylinder, i.e GL1000 up front.  I noted in HondaMan's book a reference to the dual brake setup but no mention of the need to update the stock MC.  I sent him an email and he said he has had good luck with the stock MC and only recommends the SS upgrade to the stock rubber hose to get a "harder" feel to the brake lever.

Why do so many feel the need to upgrade their MC?

[Dick Danger]

As for my exhaust, it is a factory 4-1 with a Mac Muffler.  It is too quiet and too big for my liking.  I wouldn't argue with it being on a slight bit louder, but the size is too darn big. 

I have the same muffler...and the same problem!  Any idea's what you're gonna do?

[RSchaefer]

What are you doing for the 4 into 1 exhaust if the stock exhaust is rusted out?

I see where some are trying to repair the holes in the stock exhaust or going to a MAC.

I think I would like something that makes a little nicer sound then stock but without the need to change carb jets.

I have been unable to find a nice long (30+") muffler with a 2 & 1/2" inlet.  Has anyone found a good looking solution?

[Mandic]

My 4-1 is cruddy.  Under the engine from years of oil leaks and such it ate away the coatings on it.  It isn't really rusty and I don't clean it thoroughly for fear it would then rust.  One of the clamps needs to be reshaped(the #1 pipe can just float back and forth if you take the pipe off.  To clean it up would require dipping, sand blasting, recoating, and maybe new clamps.  None of which I'm willing to put into a stock 4-1.  I will likely sell it when I get a new exhaust because it really isn't in THAT bad of a shape.  And I'm sure someone would be happy to have it for a resto or just a change.

I am likely going to get an entirely new exhaust.  Most likely the Cycle-X 4-2-1 with their race double megaphone.  I'm betting it will end up being too loud under heavy throttle(I live in a city), but maybe I can design an add on baffle setup to reduce that a bit.

If I were at my home in PA still I would likely chop up the Mac muffler and make it shorter with less internal parts to achieve my desired results.  However I am not there and don't have the facilities in my apartment that I did at my big garage in PA.  I have my welder and plasma cutter, but no outlet to plug them into, let alone a shop to work in.

[Mandic]

As for the Master Cylinder thing, Randakk actually sells an upgrade Master Cylinder for the GL1000s noting the spongey brake feel they suffer from(his words not mine).  Sounds along the lines of what I am thinking about.  Part of my asking if the GL1000s had the same caliper piston size was wondering if this upgrade that Randakk sells could work for me on my CB.

EDIT: Adding the link to the GL1000 one Randakk sells.  He notes high lever effort, I certainly do not suffer from that.  Just a lack of feel and a bit spongey.

http://www.randakks.com/Brake%20Parts.htm#1

[Mandic]

Has anyone done the 630 to 530 chain conversion?  Say with this kit: http://cgi.ebay.com/ebaymotors/530-Conversion-Chain-Sprocket-Honda-CB750F-77-78-18-46T-_W0QQcmdZViewItemQQhashZitem4aa2cade74QQitemZ320558784116QQptZMotorcyclesQ5fPartsQ5fAccessories

I really feel like my bike is due for a new chain, and I don't want to put a new chain on my 36,000 mile sprockets.  Especially after the previous owner had put the front sprocket on backward, thus angling the chain a slight bit and rubbing my engine cases.  Makes me thing the wear on that front sprocket isn't great.

The thing is, I was thinking about stepping up my front sprocket from a 14T to a 15T.  Just to reduce my highway RPMs a tiny bit.  I am trying to figure out how to do the math to get a 530 front sprocket to match this idea.  The slight change that the 14T to 15T would bring me is about all I want to do.  Just trying to determine how to do that AND convert to the 530 chain.  

EDIT: Answered my own question.  A 17/48 should match very closely to the 15/43 I had thought about. 2.824(17/48) final drive vs. 2.867(15/43) final drive.  The factory 14/43 works out to 3.071.  These numbers all came from the Gearing Calculator: http://www.sohc4.net/index.php/archives/337

[cobrajunkie]

I looked up Stone. Looks like a good movie, but I can't get it on Netflix. Not even a DVD to send to the house. The wife got some good laughs when I read the overview of the movie to her. I did watch The World's Fastest Indian with Anthony Hopkins. It's a real good story. I've been thinking about it a lot since I'm thinking of shipping my bike. I don't think I'll be stopping at the salt flats on my way though. Well, it would be fun...

I ordered it on Amazon.  I'll send it to you when I'm done if you wish.

 I just received "Stone" and watched.  Good flick.  Man, you auzzies are a tough crowd and not very nice to your local law enforcement.  Now I know where the Village People got their idea.      Looks as though there are some nice roads down under.  If you ever want to house-swap, drop me line. 

Radam,  send me a PM and I'll send it off.  Just forward it to another lucky member when you're done.

[Retro Rocket]

There was a "STONE" anniversary ride a few years back and literally 1000's of guys turned up to ride, it was awesome, never seen so many Z900's in one place...