79 Honda CM400T - Nerdsports Racer - SHE'S DONE!!

[nerdsports]

Re: 79 Honda CM400T - Nerdsports Racer

I think your swingarm definitely needs some support. The arms were never designed to run without the support of the twin shocks, so it will flex with verticle loads and with side loads. I suspect it will fail soon. That would be bad!

This is from the AHRMA rulebook, but clearly shows that it isn't hard to do. Since you don't have to meet the rules, I would use larger diameter tubing.

It's in the works.

 

[Brodie]

Re: 79 Honda CM400T - Nerdsports Racer

Nice work so far. Looks like it will turn out great. Just a note on the exhaust. I did a bit of reading when I was doing my build and found that open pipes will make you loose power from the midrange because of the lack of pressure. It is caused by a reverb pulse getting to the end of the pipe and turning back around and halting the other pulses. It can be tuned out some what but still has no where near the potential of a muffler.
I know it sounds dumb but there are a few videos with dino results around. Check out a shorty muffler or even just make your own.

 

[manolon6]

Re: 79 Honda CM400T - Nerdsports Racer

Really nice work!!!

 

[nerdsports]

Re: 79 Honda CM400T - Nerdsports Racer

Nice work so far. Looks like it will turn out great. Just a note on the exhaust. I did a bit of reading when I was doing my build and found that open pipes will make you loose power from the midrange because of the lack of pressure. It is caused by a reverb pulse getting to the end of the pipe and turning back around and halting the other pulses. It can be tuned out some what but still has no where near the potential of a muffler.
I know it sounds dumb but there are a few videos with dino results around. Check out a shorty muffler or even just make your own.

I'm aware of this as well. I was going to add baffles to each pipe just before the collector to quite them down and create some back pressure. My last weak attempt at finding baffles for 1.5" tube wasn't successful.

 

[MotorbikeBruno]

Re: 79 Honda CM400T - Nerdsports Racer

http://www.ebay.com/itm/1-5-SHORT-LOUVERED-EXHAUST-BAFFLE-free-shipping-for-2-/150920244674?pt=Motorcycles_Parts_Accessories&hash=item23238c2dc2&vxp=mtr

POW! Backpressure. Needed them for my KZ550 when I did 4-4 pipes.

 

[CM400A]

Re: 79 Honda CM400T - Nerdsports Racer

question for you sir what diameter OD is the CBR600rr fork tubes that go in triple trees as i got 2003 yamaha R1 complete front end and stem looks like not gonna work out unless to get custom sized bearing or if the fork tubes OD is the same just get honda CBR600rr triple trees and swap the forks. please let me know which tapered bearings did you use and fork tube outside diameter thank you

 

[2.3efi]

Re: 79 Honda CM400T - Nerdsports Racer

Looks awesome, love the CL style exhaust! Wish our locations weren't so far apart, would be cool to get together and shoot our two cm's together.

 

[oldskool]

Re: 79 Honda CM400T - Nerdsports Racer

looking good man!!!

 

[nerdsports]

Re: 79 Honda CM400T - Nerdsports Racer

Looks awesome, love the CL style exhaust! Wish our locations weren't so far apart, would be cool to get together and shoot our two cm's together.

The finished bike looks great man! My bike's got nothing on yours! haha I'm getting impatient. I need to finish this thing already.

 

[nerdsports]

Re: 79 Honda CM400T - Nerdsports Racer

Working on giving the exhaust tubes a seamless look. A lot more work than I imagined.

Fiberglassing done. Working on smoothening the mess I made. And the seat pan & foam is ready for upholstery.

Frame painted & clear coated.

CDI and regulator mounted under/inside frame.

Assembling it as I finish each piece.

 

[cardinal]

Re: 79 Honda CM400T - Nerdsports Racer

Nice build and concept. That original frame really needed some help!

 

[Rich Ard]

Re: 79 Honda CM400T - Nerdsports Racer

I do believe this is going to be rad as hell.

 

[longhorn717]

Re: 79 Honda CM400T - Nerdsports Racer

Looking even better than I imagined. Can't wait to see more

 

[PeteyWash]

Re: 79 Honda CM400T - Nerdsports Racer

You're killing it Tony! Awesome!

 

[volthause]

Re: 79 Honda CM400T - Nerdsports Racer

Definitely looking cool.

 

[oldskool]

Re: 79 Honda CM400T - Nerdsports Racer

can't wait to see her all together!!

 

[nerdsports]

Re: 79 Honda CM400T - Nerdsports Racer

Dropped off the tank and tail with the painter today. I honestly don't know when they'll be ready but the rest of the bike will be ready to go when they're back.

Exhaust is done.

Ignition looks stock.

Made the swing arm brace.

Shock mounts tacked & ready to be welded in.

 

[deepwaterimports]

Re: 79 Honda CM400T - Nerdsports Racer

looking beautiful, exhaust is epic, colour so far fantastic, design is sleek if I was over there id offer to buy her. very good work mate well done.

 

[CM400A]

Re: 79 Honda CM400T - Nerdsports Racer

hey doing the front swap on the bike and want to put the same comstar in the rear what size rim diameter and width and tire size ? please help me out on this one thanks a lot

 

[nerdsports]

Re: 79 Honda CM400T - Nerdsports Racer

hey doing the front swap on the bike and want to put the same comstar in the rear what size rim diameter and width and tire size ? please help me out on this one thanks a lot

The rear wheel is stock. 16x2.50 on a 120/90-16.