Topic: "Zasshuken" Monoshock cb750 build

[calj737]

http://cycleplicity.com/products/410424-shorai_lfx14a5_bs12_inc_lithium_batt_14ah_12v_eq__a_5.aspx?utm_source=google&utm_medium=cpc&utm_content=410424NOFITMENT&utm_campaign=GSNOFITMENT&adtype=pla&kw=&utm_term=&adpos=1o1&network=g&gclid=CN-TruaQjssCFQocHwodYToOyQ

This is the one you want. The A5 designation is the frame size of the battery. The item referenced at DCC is the stock sized unit. Both are equal capacity ratings.

[cbxr750]

Thanks for the tips on the battery. Im going to make a paper model of the shorai to see how it fits. Came up with a cool name for the build. Zasshuken is Japanese for the mutt. Quite fitting since the bike has parts from all different years, makes and models. Hit a bit of a snag with the rear wheel. Turns out the guy sold me a 1992 gsxr 1100 wheel which is almost 2 inches wider than the 88 wheel. I am working on a solution for that now. Ordered bolts and such for the linkage so hopefully can attach the arm to the frame soon. Still need to bend my hoop and integrate the tail light then start the electronics tray. its a long road ahead but i am making strides. Heres a couple pictures of the rear wheel clearance.

[Retro Rocket]

The 88 wheel is an 18, not a 17, it should be a 18x 4.5, the 88 front is 18x2.75

[cbxr750]

The 88 wheel is an 18, not a 17, it should be a 18x 4.5, the 88 front is 18x2.75

Correct this is a 17x5.5 off of what i believe is a 92

[cbxr750]

Huge progress this weekend. Spent 3 full days on her with some help from my best friend. Got the cognito stem and triple on. Hoop bent and welded in. Suspension setup welded in. Shes sitting on her own weight now. Just need the lower bracket made for the linkage.

[cbxr750]

Been a little while since I have updated the build. Got the rear wheel wrapped up. Just needed the 992 gsxr caliper bracket and a spacer and all clears. Got the caliper and master in. rear set brackets are in but need to be modified to fit. They are extremely thick! finishing up the oil tank this week. It is very ugly but it should work out fine. need to get the lower suspension link brackets welded in and the brake caliper arm bolted to the frame, mount the coils and the frame will be done. Figured out a solution for the tail light since i do not have the money or skills to notch the rear hoop for it. hope to have the frame out for powder next week.

[calj737]

To notch that taill hoop the "cheap and DIY way" you can make jig and use a drill. Drill lots of round holes, then Dremel them into a slot.

Something like this-
https://spieglerusa.com/lsl-drill-jig-7-8.htm

You can use this to clamp around the hoop, keeping the drill hole perpendicular, then drill your hole, move, drill, move, drill. Allows you to remove the outer skin of the hoop, and then file or Dremel out the balance for custom, recessed and flush fit.

[cbxr750]

To notch that taill hoop the "cheap and DIY way" you can make jig and use a drill. Drill lots of round holes, then Dremel them into a slot.

Something like this-
https://spieglerusa.com/lsl-drill-jig-7-8.htm

You can use this to clamp around the hoop, keeping the drill hole perpendicular, then drill your hole, move, drill, move, drill. Allows you to remove the outer skin of the hoop, and then file or Dremel out the balance for custom, recessed and flush fit.

Ah shoot thats genius! My idea will work for now. My overall plan is to get it on the road this summer. I think Ill end up keeping this one for quite some time and will refine it down the road. maybe big bore kit. we will see.

[SOHC4 Cafe Racer Fan]

I like the amount of progress, but I am still wondering how this bike will turn with that long swingarm.  Not my bike and not my problem, but I would hate to see you put so much work in on making the swingarm work if it ends up turning like a pig. 

There, I said it. I just want your time and effort to be worth it, that's all.  Carry on.

[cbxr750]

I know what you mean. I still am wondering as well. on the plus side, I do have the option of switching to a 750 arm which is shorter and changes the linkage design but - in theory - would be a direct swap and can retain all of the work i have done. I am hoping i do not need to test this theory as i really love how this thing sits. i have been able to push it around the driveway. it is a boat but its tough to tell until the link for the cushion lever is done and the tire is on. those 2 variables can drastically change the turn in angle. by the way,  the tire is a 180/55/17   

[Jerry Rxman Griffin aka MuthaF'er]

I like the amount of progress, but I am still wondering how this bike will turn with that long swingarm.  Not my bike and not my problem, but I would hate to see you put so much work in on making the swingarm work if it ends up turning like a pig. 

There, I said it. I just want your time and effort to be worth it, that's all.  Carry on.

There you go thinking café racer again LOL

[SOHC4 Cafe Racer Fan]

I know what you mean. I still am wondering as well. on the plus side, I do have the option of switching to a 750 arm which is shorter and changes the linkage design but - in theory - would be a direct swap and can retain all of the work i have done. I am hoping i do not need to test this theory as i really love how this thing sits. i have been able to push it around the driveway. it is a boat but its tough to tell until the link for the cushion lever is done and the tire is on. those 2 variables can drastically change the turn in angle. by the way,  the tire is a 180/55/17   

IF you thinking of going with a Honda period swingarm, I would suggest using a CB550 swingarm.  It is approximately 1 inch longer than the 750 swingarm and accommodates a wider tire.

[SOHC4 Cafe Racer Fan]

I like the amount of progress, but I am still wondering how this bike will turn with that long swingarm.  Not my bike and not my problem, but I would hate to see you put so much work in on making the swingarm work if it ends up turning like a pig. 

There, I said it. I just want your time and effort to be worth it, that's all.  Carry on.

There you go thinking café racer again LOL

Well, whatever you want to call it.  With the modern front, I see no need for a drag bike, which is what it will handle like if he uses the much longer swingarm.

[Jerry Rxman Griffin aka MuthaF'er]

I agree but doubt he will be doing any café racing :-) What he WILL be doing is looking real good! Form vs function. 

[cbxr750]

Maybe drag racing if I do the big bore kit next off season  Right now yes, head turner is the goal which i know is not everyones cup of tea but that is what the custom world is all about.

[Retro Rocket]

Maybe drag racing if I do the big bore kit next off season  Right now yes, head turner is the goal which i know is not everyones cup of tea but that is what the custom world is all about.

I couldn't disagree more, I can show you plenty of custom bikes that are far better than the original bike after customization, using good quality suspension parts, that , if used properly, would make a bike handle much better, to make a bike handle worse makes no sense to anyone that understands how a motorcycle is supposed to work..  Sorry but its true...

[cbxr750]

I get what your saying. But let me put it this way. there are a ton of styles of bikes that handle different from factory. Its the same as making a trike or making a drag car or making a lifted truck. Its about what the owner likes and what the owner wants to build. This is what I like so this is what i build.

[Retro Rocket]

I was just refuting your statement that "that is what the custom world is all about", that stretched rear end thing seems to be more of an American thing, I've been customizing bikes for over 35 years and never made one handle worse....Although, I may build a sweep the floor chopper at some stage, only a mild one though 

[cbxr750]

I was just refuting your statement that "that is what the custom world is all about", that stretched rear end thing seems to be more of an American thing, I've been customizing bikes for over 35 years and never made one handle worse....Although, I may build a sweep the floor chopper at some stage, only a mild one though 

It could be an American thing lol  I understand what you are saying. I like being out of the box. I will say i am leaning toward keeping this thing for a while. It could see a couple different variations. the initial reason for this arm is because I found that it was the easiest to fit. this is my first truely custom bike and i have learned a TON about building bikes in just the last couple months of working on it and i truly appreciate everyones input. even if i get a bit stubborn 

[cbxr750]

Progress update:
Pretty much wrapped up the frame. Hoping to have it and the rest of the parts out for powder coating by the beginning of April. Gsxr fender is trimmed up in the front. Got the tire and battery in from bike bandit. soda blasted the engine and painted it yesterday. Made a pan for the hoop to keep the dirt and stuff out of the rear end. Almost finished the oil tank. making the headlight and gauge brackets this week and fixing the rear set brackets since they are too thick.

[SOHC4 Cafe Racer Fan]

Interesting suspension rig for the engine.  The paint looks good. 

[cbxr750]

Interesting suspension rig for the engine.  The paint looks good.

thank you! Turned out better than I had expected. The engine is on a harbor freight crane. My engine stand is being used for a motor swap on the 68 suburban in the garage.

[cbxr750]

Been a while since ive posted. Pretty much wrapping things up to get ready for paint. started making a foam mold for fiber glass and began the fiber. not super happy with it so i may end up doing a metal cowl. also need to get a seat made. other than that pretty much everything is solved and purchased. enjoy the pics. if you have any questions ask away!

[unamusedd]

The progress looks great! I was going to order Devins new air box as well for my build but some vandalism occurred at my home that required the funds be spent elsewhere. It looks like such a good piece and hopefully performs better than the pod filters. I'm excited to see your final result.

[cbxr750]

The progress looks great! I was going to order Devins new air box as well for my build but some vandalism occurred at my home that required the funds be spent elsewhere. It looks like such a good piece and hopefully performs better than the pod filters. I'm excited to see your final result.

Its a very nice piece as usual from Devin. I too am excited to see how it flows and the tune ability. starting to see the light at the end of the tunnel on the build. hoping to wrap it up by the end of the month.