Suggestions? on modifying bk100 pipe on Tomos

I'm just double-checking if anyone has any suggestions on the best way without ruining the pipe to modify it for Tomos..

This pipe sounds mean and deep ... No more ping ping sound... I'm thinking of cutting two slits then keep it on the left side... I'll take it somewhere and have it welded up...

I have also heard heating up the pipe will work... But I think it's too much of a bend to attempt it...

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Re: Suggestions? on modifying bk100 pipe on Tomos

go and buy a cheep welder.

Re: Suggestions? on modifying bk100 pipe on Tomos

Trade it for a Tomos one? Or like pat said buy a cheep welder cut some slits and bend it up and tack it back together. Make some kind of hanger for the left side(edited)

Re: Suggestions? on modifying bk100 pipe on Tomos

Ok thanks...the Tomos one won't work with the 80cc big port metriakit...that's why I bought the puch

Re: Suggestions? on modifying bk100 pipe on Tomos

I reckon you can get bending on that. Try bending first, as it's free and then see how you end up. Might get it perfecto, might only need one slit and weld.

Re: Suggestions? on modifying bk100 pipe on Tomos

Brandon Weiss (Detective brandon to you) /

Is the kit a flat port? If so, treats sells a Cali pipe designed for puch flatport kits on tomos.

Is it angle port? If so, any tomos A55 pipe should bolt right up. Alternatively, a puch magnum pipe would at least have the correct angle, but it'd still be on the right side and mounting the rear securely would be trickier. No, don't bolt it to the swingarm.

If you want to do it the hard way with the pipe you currently have, I would heat and bend it in stages, along multiple points in the header. If you bend it all at once in one spot you'll flatten/collapse it. Now that you started the bike, the pipe may have oily exhaust residue inside that will make welding difficult, and it would already be somewhat difficult given the material nature.

Also, you should probably keep everything in one thread relevant to the bike as a whole.(edited)

Re: Suggestions? on modifying bk100 pipe on Tomos

Thank you...

Re: Suggestions? on modifying bk100 pipe on Tomos

Dirty30 Dillon /

Brandon's right on with info.

If you are looking to modify the shape of the pipe, it is obviously important that you keep the tuned length the same or as close as possible.

I would also agree that keeping all your info in your build thread is a great idea, versus starting individual threads for each problem. This will reduce the redundant questions and answers you're bound to get

Re: Suggestions? on modifying bk100 pipe on Tomos

Okay,

thanks again...I'm sure that's important to do that because you can't just delete a post after you've already discussed it with someone.... I appreciate the information... I was able to get this pipe for $100... Or I would have bought the one for the Tomos... I put the a35 pipe on last night and it fits exactly the same just the opposite side...

I'm going to try my a55 pipe tonight... And if that one fits then I can at least have the angle to match and don't have to have the bike present during modification...

Re: Suggestions? on modifying bk100 pipe on Tomos

Look,

It's like this.

If you want to be a baller and build wyyyked shit, get a chop saw and a welder and make it work. Not very hard to do, and you'll be able to mod anything steel after this. It's super important to being a competent moped builder.

And don't go trying to bend a bk100. It'll crack super fast. Better to chop and weld.

And lastly to pipe length and the comments that it has to stay exactly the same length, well....that's bullshit. Change it any way you like, shorter header, longer, etc. it doesn't matter.

You might get a lil higher revs, or slightly less.

Modifying a header takes a LOT of removal to change the power.

1 inch of header removal only equals 400rpm. The only thing that will fuck up your shit is if you mess up the welding and leave mismatched pipes blocking flow, or leave slag inside the pipe that will kill your engine when it gets sucked back in to the cyl. ALWAYS CLEAN OUT A PIPE WITH WATER AFTER WELDING TO FLUSH OUT ANY LOOSE DEBRIS

Re: Suggestions? on modifying bk100 pipe on Tomos

Update...

You guys are some hard dudes... I thought that this form was for ideas, inspiration, and making it happen....

So that's what I did!!

I'm learning!!!! I came up with my own way in case anyone else needs to do this... I got a mapp gas torch because Burns a little hotter than propane...

Then I took my Jack with some wood and strapped my bike down... As I heat it up the pipe I just moved to jack up a little bit at a time... And that's it... Now I will double up on my exhaust gaskets just to be on the safe side... And I'm happy with the results... I didn't need to buy a cheap welder and I didn't need to go to treats and buy a Tomos pipe...This is the Puch bk100 angled port exhaust pipe on a 80cc metrakit mounted to a Tomos a55 engine....It's called making it happen!!!

So to the people it was nice I'm trying to help and giving me some tips... I want to thank you

And the rest of you all... Well

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Re: Suggestions? on modifying bk100 pipe on Tomos

Oh yeah and here's the bracket I made... I hope it doesn't change my RPMs..

And all that other bullshit your talking about!!!!

I tell you what... I've lost all respect... Talkin all that bullshit!!!

I'm sure there's something wrong with the way I did it and my bracket I made... Mr. Know it all

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I modified bk100 Puch pipe on a Tomos and installed a 80cc Puch metriakit

Here's the z bracket I made out of some aluminum pieces.. I will paint It Black later...

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Re: Suggestions? on modifying bk100 pipe on Tomos

Hahaha you are so butthurt over stuff. Why? Are you so insecure that you can't take any advice that you asked to get? You're an odd one.

Re: Suggestions? on modifying bk100 pipe on Tomos

Great job!

Re: Suggestions? on modifying bk100 pipe on Tomos

♣Slew Foot♣ /

I did the heat and bend. The heat and vibration overtime split the sides where it was bent.

I use spring mount spigot types on a short header pipe. Any time I bolt stuff on The bracket or weld will break. Potholes and curbs the odd bang and bump sideways the studs snap. Perfect roads sure weekend bike. But if your gonna ride it like you stole it. 17,000 a year I put on my bike average. You might want to go with the vibes.

Re: Suggestions? on modifying bk100 pipe on Tomos

I'd heat that whole header up with a torch to anneal it, reduce cracking risk.

Neato tho

Re: Suggestions? on modifying bk100 pipe on Tomos

Either way... I feel good it's done and I just bent it very slowly and let it cool and didn't put heat in the same spot... I started at the top of the bend and work my way down a little at a time... I did not rush it... And hoping to have good luck... I didn't many suggestions... So that's what I came up with... I know people put sand in them and I've read a lot of success stories.... To be honest if it does crack for some odd reason then it should be no problem having someone welded up for me if I don't have my welder by that time... I'm very pleased with the way came out...I will not be running it like I stole it ...but I bet it will be alot of fun....do you have any photos of the pipe you did...I'm an electrician and I bend emt conduit alot and that may have played in my favor....I didn't have alot of coating flaking off and I was very surprised... I am really happy with my bracket also ..I hoard them from light fixtures we install and don't need....

Slew has been in the game for a long time and I appreciate your input...I'm getting excited to ripp!!

Thank you

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Re: Suggestions? on modifying bk100 pipe on Tomos

Yes I know I am an odd one... But at least I'm not obsessed with butts..lol

Re: Suggestions? on modifying bk100 pipe on Tomos

It's funny how all of a sudden the reply has been changed....

You know what you did and said... But either way I'm cool with it.... I should have screenshotted it...

I know this is the part where you say what? What are you talkin about? ...it's cool

Re: Suggestions? on modifying bk100 pipe on Tomos

Anonymous User /
scootertrash

Are u on flat view? Turned out great Hot Nuts!

Re: Suggestions? on modifying bk100 pipe on Tomos

Dirty30 Dillon /

Don't ask for advice if you can't take it.

There is always more than one way to get the job done, the suggestions were for best results not for lack of other possibility.

I can tell you now that that bracket is going to fail. I work with lighting fixtures all day and anything meant to be static hung is about as cheap a metal as can be afforded. IT will work for testing and tuning, but I would not ask it for any more than that.

Re: Suggestions? on modifying bk100 pipe on Tomos

I can take it... What I don't like is when I get comments about my tools and my shop...basically things I work really hard for... comments about the Stuff that's irrelevant to the questions I'm asking....

Also crazy that my comments and other people's comments are being altered or they're just are not uploading all of a sudden ...only half of them appear to be loading...either way I have a Tomos with a 80cc puch metrakit with a modified bk100 mlm pipe

And I think that's pretty sexy badass

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Re: Suggestions? on modifying bk100 pipe on Tomos

Dirty30 Dillon /

You will find this site more manageable if you click "FLAT VIEW" :

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Re: Suggestions? on modifying bk100 pipe on Tomos

> Dirty30 Dillon Wrote:

> -------------------------------------------------------

> You will find this site more manageable if you click "FLAT VIEW" :

> >

Everybody knows that's the evil button thats alters posts and makes them disappear.

Re: Suggestions? on modifying bk100 pipe on Tomos

> Bas Autowas Wrote:

> -------------------------------------------------------

> Everybody knows that's the evil button thats alters posts and makes them

> disappear.

I always wondered about that . ;)

Re: Suggestions? on modifying bk100 pipe on Tomos

I do look at it in flat view... lol

It still doesn't explain why there's comments that don't show up and there's other ones that I read but I will respond and then they disappear...

I'm going to screenshot them next time... I'll get you my pretty...

Re: Suggestions? on modifying bk100 pipe on Tomos

In stead of clicking "reply" under people's posts you should also just quote them, as the whole "reply" thing doesn't work in flat view.

Re: Suggestions? on modifying bk100 pipe on Tomos

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I mean it is all good if it worked out I just worry because it is an expensive pipe to have crack. I know lots of them have cracked at the welds from being stressed or mounts breaking. I mean if the pucker don’t crack your all good.

Re: Suggestions? on modifying bk100 pipe on Tomos

Flexy rear frame mounts are the worst for header breakage. The header cracks like I think this one will, or if you're lucky enough to have it stay solid, the studs/exh screws will break off from even slight flex at the frame mount.

Spring mounted headers are the safest, but can leak if not done really well.

I've just seen lots of MLM header cracks even when no heating had been done and a solid rear frame mount,

I feel like pipe makers should use thicker header steel, I add a welded or brazed steel strap to the outside of some of my headers due to repeated breakages. Worst sound ever to hear when you're out far from home and you hear that distinctive header opening up "croak" then its louder and louder then its fucking awful(edited)

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