Topic: Stev-o's K4 "Big Bang Theory"!

[martin99]

Hi Stev-o, I ride a stock K4 and will be listening more to my motor sounds now.  One of my front caliper bolts backed out while riding and sheared off about 10 spokes and i came to a sudden stop.  Luckily, I was just going about 40mph where there was less traffic.  Limped the bike back home and got everything fixed up.  Quite a story to tell about your K4 now.  Thanks for sharing your " Big bang theory."  ( The day this happened, I did a safety check before going out for a ride just like you)  God gave me a blessing that day.

Wow, thats quite a story.  Glad it had a good ending.

Wouldn't have happened with comstars. God made me choose an F.

But seriously, glad you're both still here to tell your stories.

[754]

Some guy will say go get a lottery ticket..
754 says go get a bottle of blue Loctite...

[martin99]

Some guy will say go get a lottery ticket..
754 says go get a bottle of blue Loctite...

^^^^^
 

[Terry in Australia]

Wouldn't have happened with comstars. God made me without a sense of taste, that's why I chose an F, and a couple of Pommy oil distributors. I must have been a real arsehole in a previous life............

FTFYM.........

[ekpent]

 So does it have domed higher compression aftermarket 836 pistons in there ? Stock cam ?  Was the top of the 'loose' one beat up pretty bad ? Inquiring minds want to know 

[Stev-o]

Yes, aftermarket Wiseco 65mm pistons, stock rods.  It got hot and beat up pretty bad...


Bill B says he has a set of pistons for me, waiting on more info from him.  I have a spare cylinder than I will have bored.

So after about 6 cocktails on Friday ["Sinko de Maya!"] I had a couple crazy ideas.  The H2 seat seems to fit on the K4 and looks pretty good!!!

[ekpent]

 I'd probably save the Kaw engine for a future Kaw project so as not to have to hack up the frame on the 750 and also be easier just to fix up another old Honda engine. Plus I am not too talented at fabbing stuff up like that. The 750's do run pretty good with some higher compression slugs in there. Hopefully Bill can fix you up as those Wiseco's are kinda pricey but good.  One or two little nuts can cause a lot of Hell and dollars    What year is the extra Kaw engine Steve, a black 1973 would be good for extra dollars.

[Stev-o]

I'd probably save the Kaw engine for a future Kaw project so as not to have to hack up the frame on the 750 and also be easier just to fix up another old Honda engine. Plus I am not too talented at fabbing stuff up like that. The 750's do run pretty good with some higher compression slugs in there. Hopefully Bill can fix you up as those Wiseco's are kinda pricey but good.  One or two little nuts can cause a lot of Hell and dollars    What year is the extra Kaw engine Steve, a black 1973 would be good for extra dollars.

Dont worry Eric, they were just drunk thoughts!   The spare Z1 motor is in the '75 year model range, same as my Z1.  The price was so reasonable I had to buy it...

[754]

SteveO, hat piston is not bad..
 Its called Shinko de Mayo...not Stinko de Mayo
 And Z1 seats  and taiks fit even better than that, I tried a Corbin KZ 1000 seat..

[ekpent]

I'd probably save the Kaw engine for a future Kaw project so as not to have to hack up the frame on the 750 and also be easier just to fix up another old Honda engine. Plus I am not too talented at fabbing stuff up like that. The 750's do run pretty good with some higher compression slugs in there. Hopefully Bill can fix you up as those Wiseco's are kinda pricey but good.  One or two little nuts can cause a lot of Hell and dollars    What year is the extra Kaw engine Steve, a black 1973 would be good for extra dollars.

Dont worry Eric, they were just drunk thoughts!   The spare Z1 motor is in the '75 year model range, same as my Z1.  The price was so reasonable I had to buy it...

Keep drinkin' Steve is was a good idea !! I have seen some of those type of hybrids before out on E-bay.

[Stev-o]

SteveO, hat piston is not bad..

Not bad?  Certainly not good!!!

[754]

As far as blowups go that is pretty good.. I got a Yoshi rod out of a 1060 that is in 20 pieces..
You would have to really  look at outside of the case to see where it hit..needs a little bit of welding.
 Case number 10,w**

[Stev-o]

You would have to really  look at outside of the case to see where it hit..needs a little bit of welding.
 

I guess your case was better than mine, I dont know a weled that can fix a 3" hole!

[754]

It wasnt welded yet, barely a bump on the side.
 In early motorcycles they fix cases like yours..

[ChromeDreams]

Steve who do you like for boring/machining in the area?

[Terry in Australia]

H2 seats (and Z1 seats, for Frank) look really good on the bikes they were designed for, but not so much on our old 750's. I notice that Z1 engine is in an F2 chassis Steve, and that makes perfect sense, there are plenty of F2 chassis' out there, due to their fragile engines crapping out earlier than anticipated.............

[Stev-o]

Steve who do you like for boring/machining in the area?

Curtis at Custom Cycle and Machine, he is in Cedar Park.

PM me if you need more info.

[RAFster122s]

Kaw Z2 is going to be in article coming up in an issue of Motorcycle Classics they are working on producing...
fyi

[Stev-o]

Quick update......head has been removed from cylinder with no damage and I've bought parts from Bill to rebuild a top end....

http://forums.sohc4.net/index.php/topic,165623.0.html

Bad news is my spare motor is a K8, and I really want to use a K2-K6 on this K4.

[I know the K8 can be made to work, but dont want to do it with this bike. I will use that motor in the K6 roller I have]

Forum member Trey has a good bottom end that I can get, just need to hook up with him [he's about 2 hours away]

[754]

What kind of rods will it have ?

[CycleRanger]

More importantly what kind of rod bolts? 

[Stev-o]

Quick update:  Received the parts from Bill B yesterday.  Love when these Hi-Po parts come in the box...


 


Prepping the 836 jugs for paint....


 


Cam looks good.....





Need some help here. What cam is this??


by

[seanbarney41]

Kenny Harmon d grind

[Stev-o]

Kenny Harmon d grind

Thanks Sean.

I would have guessed a D grind.  Apparently distributed though Action Fours back in the day, theat is the exhaust this bike came with too.

Kenny Harmon Cams

Among others, Kenny Harmon cams were distributed by Action Fours and Megacycle:

                                                                    In o/c
                                                                    Ex o/c
         Valve   Durat-                                             btc/abc
Cam      lift    ion       Description                              bbc/atc
---------------------------------------------------------------------------
D        .345    277       A famous grind. Excellent for a major HP  32/65
         .325    294       increase, yet a wide range of use. Long   77/37
                           exhaust duration for sustained high speed
                           cruising without excess combustion chamber
                           temperature. May be used with stock
                           springs if desired.

[PeWe]

You need better rods!
http://forums.sohc4.net/index.php/topic,165965.msg1918035.html#msg1918035
Coming soon from APE
Honda CB750 "Hot Street Rod"
Designed to fill the gap between oem rods and Carillo H Beams.
Designed for the street hot rod that needs the added security of a non oem rod, but doesn't need a full on race rod.
100% machined from 4340 billet steel and heat treated. APR 12 point bolts round out the package.
HSR750 Will debut at under $600 a set.