The Jap Slap build by Back Porch Choppers

[Back Porch Choppers]

Hey everyone, I'm new to this forum and a novice chopper builder. I'm currently building an XS 650 chopper for a friend. This is my first XS and only my second complete chopper build. This XS is to include a 700 big bore rephased engine built for us by Ryan @IronHeartCycles. As far as I can tell from the chart I found on this forum the frame is a 75-76 with an existing TC bros. hardtail. OK picture time!!!

 

[Back Porch Choppers]

This is what my bro found down in the Big Easy and gave me to start with.

 

[Back Porch Choppers]

Got it to the house and on one of the lifts in the shop.

 

[Back Porch Choppers]

Ryans handy work with the engine.

 

[Back Porch Choppers]

Ordered up a frisco sporty tank, a Pandamonium exhaust kit and some other tid bits.

 

[Back Porch Choppers]

Pulled out the old stock XS650 engine (future build) and stripped this thing down to the bare bones. Got the rust and paint off. The I cut out the upper motor mount brace and neck/fork stop brace which I'll be replacing with a frame gusset and a windowed neck treatment for structural strength in the neck area. Well thats the current state of The Jap Slap.

 

[BobbedSled]

Alright, build thread. Good fun. Looks like decnt staeting point. Love peanut tanks too.

Looking forward to how the motor works. Tend to be skeptical of big bores but it it works problem free there us one in my future.

 

[Back Porch Choppers]

I do have a couple questions. 1 bike related and one forum related.

1) I was able to ID the frame from the chart on this forum however, how do I ID the year of the actual engine? I have not been able to locate any identification vin stamp on the motor?

2) Can I change my screen name? How?

 

[littlebill31]

VIN is on the front near the front engine mount.
Below the oil tube.

 

[Back Porch Choppers]

VIN is on the front near the front engine mount.

Thanks littlebill31. I found it and according to the chart the engine I pulled is an 80-81 XS SH. It's going to be used in a future build but is there anything special or unique about this motor I should know about?

 

[littlebill31]

Not really. It just about the same as the others. '80 was the first year for TCI (Transistor Controlled Ignition) electronic ignition.
Older, real early engines are different

 

[Back Porch Choppers]

Not really. It just about the same as the others. '80 was the first year for TCI (Transistor Controlled Ignition) electronic ignition.
Older, real early engines are different

Cool man thanks.

 

[650Skull]

If your thinking of a Pamco, go to his site and buy the 277 kit with the advance rod.

Coils and electrical need to sourced else where. Monster green coils are more trouble than they are worth

 

[Back Porch Choppers]

If your thinking of a Pamco, go to his site and buy the 277 kit with the advance rod.

Coils and electrical need to sourced else where. Monster green coils are more trouble than they are worth

Hoping Hughs has the CDI system for the rephase worked out by the time I get that far.

 

[IronHeartCycles]

If your thinking of a Pamco, go to his site and buy the 277 kit with the advance rod.

Coils and electrical need to sourced else where. Monster green coils are more trouble than they are worth

You wont need to worry about the ignition on the motor I'm building it will be installed and ready to run.

 

[Back Porch Choppers]

You wont need to worry about the ignition on the motor I'm building it will be installed and ready to run.

Awesome Ryan, thats makes my day dude. I better get busy.

 

[Sparky]

Good looking bike! Keep at it and post lots of pictures. We like pictures.

 

[Back Porch Choppers]

Good looking bike! Keep at it and post lots of pictures. We like pictures.[/QU

I'm hoping my vision will turn out on this one as it did on my Triumph and people seem to dig it. I would post a pic and show off my work but I'm not sure how the mods here are and if the post would get delered or not?

 

[wrmdovr]

hoooooooooooooweeeeeeeeee! you all done got down on it son! not that my simple, narrow opinion/vision mean anything.....nevertheless, I absolutley love the direction that your build is currently listing too. since i have taken this winter off from building i have the enviable positioin of cheering from the sidelines. love it, dig it, groovin on it, etc etc. keep it going man.... WRMDOVR

 

[Back Porch Choppers]

hoooooooooooooweeeeeeeeee! you all done got down on it son! not that my simple, narrow opinion/vision mean anything.....nevertheless, I absolutley love the direction that your build is currently listing too. since i have taken this winter off from building i have the enviable positioin of cheering from the sidelines. love it, dig it, groovin on it, etc etc. keep it going man.... WRMDOVR

The mach up pictured was the direction of the previous owner. It made no sense to me with the clip on bars high tunneled tank and forward controles. Seems like that would make for an uncomfortable riding position.

My building style is 70s style roots chopper. This bike will be no different. Plans include frisco sporty tank, springer front end, sprung solo seat and puss pad with a sissy bar and flashy flaked out paint. I want to rake the neck and use the standered 16/21 spoke wheel set up but my bro wants the stock rake and current mag wheels, maybe I can atleast talk him into a lower profile front tire.