Topic: top speed of 836 or 850

[cafenut]

on a good runnin doner motor what could i expect to get for top speeds? i understand that theirs alot of variables but yaknow, an average or just what yours doese. been on plenty stock k and own two stock f's. just like to see if its all worth it or do i just use my old 1100 katana when i wanna see 140.

[MCRider]

on a good runnin doner motor what could i expect to get for top speeds? i understand that theirs alot of variables but yaknow, an average or just what yours doese. been on plenty stock k and own two stock f's. just like to see if its all worth it or do i just use my old 1100 katana when i wanna see 140.

1100 kat is an 1100. Nice bike BTW.

An 836 by itself may buy 5 mph top end. You'll enjoy it most in the middle.

A really built 836 may see 135, but the Kat will be a lot more comfortable doing it.

These are educated guesses, I'd like to hear others, but I'm not too interested in what a 40 yr old speedometer says. I'd like some proof like from a GPS or trackside radar gun.

[mlinder]

A very built 750cc (read: race bike) will see 145+
A horribly built 900 will see 110...

Too many variable to answer your question.

[voxonda]

If interested in topspeed, consider a good sleek fairing/clipons instead of a 836/850. And use a slightly longer gearing.
And look for a tailwind and maybe you'll see 130 mph. For 'real life' buy the 836/850, much more useful.

[fire113]

...I measured real 182Km/h equal to 109,63MPH with GPS and stock 736ccm and a broken piston ring. I think that was the reason why I had no power @ the 5th gear.
Next week I will try with 836ccm. I hope for a better acceleration, I really do not need more topspeed.

I will see next week what I will get with 836ccm.

[MCRider]

...I measured real 182Km/h equal to 109,63MPH with GPS and stock 736ccm and a broken piston ring. I think that was the reason why I had no power @ the 5th gear.
Next week I will try with 836ccm. I hope for a better acceleration, I really do not need more topspeed.

I will see next week what I will get with 836ccm.

109.6 is pretty good with or without a broken ring. Be careful and let us know your next reading w/ 836ccm.

[andy750]

Top speed on a 40 yr old machine feels very different from that on a modern bike  Especially if still using the stock brakes ;-)

[fire113]

...no stock breaks  ECKERT doubled and punched break discs but I think it depends more on the frame and the shock system then in the breaks.

I drove several bikes My ZXR 750 RR was going like hell up to 290Km/h.
I only had to sit on it and pull the trigger. With the old machines You really have to drive and feel the bike and the road, if not You won't get to Your destination 

sorry for My bad english, loooooooooooooon time ago the I took My last lesson.

 

[MJL]

Top speed on a 40 yr old machine feels very different from that on a modern bike   Especially if still using the stock brakes ;-)

Equal indicated speeds between my CB750 and my F4 felt very different. On the 750 you know your haulin ass, on the CBR you just look down and "I didn't know I was going that fast."

My 750 seemed to take awhile just to reach 105 on the speedo.

[754]

Fire, maybe run it in a bit before you go an a top speed run, it may last a bit longer.

[cafenut]

thats pretty much the info i was lookin for. thanks all. my uncle just purchased a git kit #1 from cycle x for his 73 k. now im not sure what his top end was before but his bike does run pretty dam good for a old rat. cant wait to see the differance. i think he thinks hes gonna just have "wheelie on demand power". yes the 30+ year old rides do feel alot diff than new machines when your over 100. my stock 76 ss will get to around 123 mph. from 90 on up shes a little bit slower gettin topped out but runs like a raped ape up to 90. my 78 ss is slightly faster but only got there once before i got ran off the road by an old woman runnin a stop sign and busted up the case. if it were not for the wet road i would've been able to avoid it. well, the 78 is my cafe project now. fortunatly i got an extra parts bike with motor when i purchased it but the spare motor has been sittin around for years in a dirty shop with no carbs or head so im sure thiers tons of crap down in the motor now. thought about just putting what i know is a good top end off the wrecked motor on it but dont want to take the chance on maybe the tranny being crap. so im gonna either man up and quit being scared and get to crackin open up some cases or get a second job and pay somone who knows what the hell they're doin to  take the best of both motors.

[fire113]

...You can bet that I will run it bit longer I think ~1000-1500 Kilometers should be enough
to run the engine in.

Fire, maybe run it in a bit before you go an a top speed run, it may last a bit longer.

[754]

Wo in Deutschland sind Sie ?

[fire113]

...just klick on my nickname and You will see 

Wo in Deutschland sind Sie ?

[NitroHunter]

my stock 76 ss will get to around 123 mph.  my 78 ss is slightly faster

Damn, neither of my stock F'ers ran even close to that good! 
Besides a hurricane tail wind, what's the trick? 

[bucky katt]

i let a 175 pound neighbor ride fuzzycycle a few days ago. i followed in his ex-state patrol z-28. 132mph from a mostly stock k4 with .75mm oversize pistons, cb750f cam and hondaman ignition box, 46 tooth rear sprocket and mac header.

[RRRToolSolutions]

Buzz/Dynoman told me a few years back when I was building my 836 that they would run the roadrace 750's on the track at 10,500~11,000 rpm race after race at 145 to 150 mph. They were using big cam, ported heads, and Carillo rods. I'm 240 lbs and block a lot of wind (54/56 coat size) and I have no doubts that mine would do 140 ish if I laid down on it, but guys THAT AIN'T GONNA HAPPEN 'cause I don't have the desire to try it. I don't even like the way 120 feels on a naked bike. My 2000 ZRX1100 Kawasaki felt odd at 135, again a naked bike just doesn't feel good to me at those speeds.

Here is mine hitting an indicated 120 in about 12 seconds and there was a lot of gearing left when I made the last shift. This was done for a sound clip of the Kerker, not for the timing. I was intentionally shifting past the peaks to allow the limiter on the Dyna 2000 to kick in. I don't have a problem twising mine up like this because of the cam, porting, titanium valve train, and those Carillo rods. I had the camera mounted on the rear grab bar - just above the pipe's outlet, so it's way noisy.

Gordon

http://vholdr.com/node/49293

[wannabridin]

i'll never get tired of listening to that video Gordon!!   

[fire113]

Hi Gordon,

...what kind of cam are You using ? and where can I get titanium valve trains ?

[RRRToolSolutions]

My favorite place to drop money.....

http://www.dynoman.net/

[fire113]

...i know this page and the cycle exchange page.

BUT what kind of cam are You using ? and which valve guides should I take when I am going to do some head work ?  

[RRRToolSolutions]

My cam is the MegaCams 265, the guides are Kibble White as are the springs, keepers, valves, and retainers. The porting must be done to make all this work and if you're going to turn past 8,500 rpm on a regular basis - almost everyone will tell you that you better have some heavy-duty rods. If one of the stockers fail (and Buzz says they absolutely will) you'll have a grenaded engine and perhaps worse - especially if that drops oil right in front of the rear tire. There aren't many places I'd want 3 quarts on my rear tire at speed. I'm using the Wiseco 836 forged kit with a street/race port job done by a long-time professional and the results are very satisfying for me. I have a strong, fresh KZ900 that this little Honda will eat alive......

Gordon

[BobbyR]

Top speed on a 40 yr old machine feels very different from that on a modern bike  Especially if still using the stock brakes ;-)

Andy, Andy, Andy, the stock brakes feel the same at top speed as any other. When you apply them is a different story.

[fire113]

...thanks a lot for that information.

last saturday I removed the engine and disassembled the head and removed the cylinder.
One piston ring was broken and absolutely NO HONEMAKS where to see anymore.
Bore and hone (for the wiseco 836 kit) will be done on tuesday and on monday I will put it together.
Maybe I can get a finished head form a friend, I will see this weekend.

Have a second kit with 900ccm but without the sleeves
I have to save a little bit of money to build up a second engine with the right parts that You told me.

thanks again...fire113

[fire113]

Fire, maybe run it in a bit before you go an a top speed run, it may last a bit longer.

...drove the last ~1000Km with a very slow gas hand and Yesterday I tried to give her a little bit more  
But WTF was that ? my new clutch (3000Km) was slipping and not only in the 5th gear!
Bought heavy duty clutch springs for the Year 76-78 (<--I think not sure!) they are harder and ~6mm longer then my old springs for my K1.

No slipping any more and the bike runs very well, the old block was like a flat tire, in the 5th gear wasn't any more power to find but now
in the 5th gear the bike will easy go in the 8000RPM direction, will test it in the next days and measure Vmax with GPS but I do not think
that the bike will be really faster without changing the front or/and rear sprocket.

Stopped @8550-8650RPM, think its fast enough 
cu...fire113