Installing a better kit

So I'm looking on treats for a new kit for my e50 Maxi. The kstar I currently have has worn rings and low compression and I'm looking to upgrade to a better kit. I don't mind spending some extra bucks to get good quality and all-around power. Can't decide on which kit puts down the best power (I have 18/42 gearing) and can top out at or above 50 mph without having to do any porting. Suggestions?(edited)

Re: Installing a better kit

Overpriced Parts /

Any reed induction kit, like Athena, treats, polini and some Tomos kits are very blasty, I like polini reed kit best but it’s not very forgiving (you need low timing or retarding ignition and hi jetting) so can be easy to seize,

Any kit you get will need file/clean up/dremel here and there to get things fit modifications for intakes and exhausts sometimes,

I would just get a cheap DMP piston port kit and you could pretty much keep the whole set up you got for the dmp and it’s way better kit, pretty much spaced correctly and has the correct Fin design too.

Doscycles has your back

https://www.doscycles.com/collections/puch/products/puch-dmp-45mm-70cc-cylinder-kit?variant=30874831618150

How many miles do you have on your Kstar kit?

Re: Installing a better kit

I have around 7k miles on it. I want to go the polini route for my e50. My timing is already set so basically I can just bolt and blast when I get it. I like the polini 64cc from treats. I believe its a 2 petal reed. Should bolt right up. I'm willing to sacrifice a little top end by leaving it unported

Re: Installing a better kit

Overpriced Parts /

> Thomas Peffer Wrote:

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

> I have around 7k miles on it. I want to go the polini route for my e50.

> My timing is already set so basically I can just bolt and blast when I

> get it. I like the polini 64cc from treats. I believe its a 2 petal

> reed. Should bolt right up. I'm willing to sacrifice a little top end by

> leaving it unported

Nope you have to case match pretty close specially the boost ports on top or it will be gas/mix starved on top that’s where it can seize

Take a look

https://www.treatland.tv/puch-moped-polini-64cc-kit-p/puch-polini-64cc-kit-144.0150.htm

Stock reed It’s one petal

Re: Installing a better kit

yeah you wont be disappointed, polini is a great kit. the new castings as of about a year ago are really nice too, way less prep and cleanup than the old ones. probably could run it right out of the box, but with a couple hours prep work, you'll get another 4-5k miles before you even have to take it apart.

if you've already put 7k miles on a kitted engine, its time for new crank bearings and seals anyhow. better to replace them now when its all apart than have it take out the crank and your brand new $200 kit.

I don't agree that the case matching is essential- some of the highest mileage polini kits i've seen were not case matched at all- but if you are in there anyhow, once again, its worth taking the time to do it right.

18/42 should be good gearing on that. a cheap pipe like a boss or bullet will have you right around 50 mph if you tune everything right. I usually ride my wife dubs so i'm geared a little shorter than that, 18x45, and my PHBG 19 polini/boss setup will do 52 on the flat and still holds 45+ up even a very large hill with both of us on it. personally i think the sweet spot for that kit is pairing it with the PHBG and tecno estoril, for a little more money you are getting a lot more performance and not getting to the point where it starts breaking shit.

Re: Installing a better kit

Overpriced Parts /

> Graham Motzing Wrote:

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

> yeah you wont be disappointed, polini is a great kit. the new castings

> as of about a year ago are really nice too, way less prep and cleanup

> than the old ones. probably could run it right out of the box, but with

> a couple hours prep work, you'll get another 4-5k miles before you even

> have to take it apart.

>

> if you've already put 7k miles on a kitted engine, its time for new

> crank bearings and seals anyhow. better to replace them now when its

> all apart than have it take out the crank and your brand new $200 kit.

>

> I don't agree that the case matching is essential- some of the highest

> mileage polini kits i've seen were not case matched at all- but if you

> are in there anyhow, once again, its worth taking the time to do it

> right.

>

> 18/42 should be good gearing on that. a cheap pipe like a boss or

> bullet will have you right around 50 mph if you tune everything right.

> I usually ride my wife dubs so i'm geared a little shorter than that,

> 18x45, and my PHBG 19 polini/boss setup will do 52 on the flat and still

> holds 45+ up even a very large hill with both of us on it. personally i

> think the sweet spot for that kit is pairing it with the PHBG and tecno

> estoril, for a little more money you are getting a lot more performance

> and not getting to the point where it starts breaking shit.

You don’t even match the boost ports? That’s a must,

Every bike I worked on or bought (which was several) that had a seized polini kit it on it boost ports were unmatched but I could see if kit was not centered and shoved down the boost ports wound be open more but not centering a kit is wrong,

Re: Installing a better kit

So Roffman what you're saying is I have to port it? I can't just bolt and run it? My timing is already 14-15 degrees BTDC (enlarged the stator slots and used a timing light to achieve this btw). Also is a 86 jet good to run with a polini paired with 15mm genuine bing/matching 15mm intake?

Re: Installing a better kit

If porting is a must plus replacing the crank I would gladly pay someone on here thats local to Cleveland Ohio to do the job since I'm not comfortable doing that (just saying)

Re: Installing a better kit

Overpriced Parts /

> Thomas Peffer Wrote:

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

> So Roffman what you're saying is I have to port it? I can't just bolt

> and run it? My timing is already 14-15 degrees BTDC (enlarged the stator

> slots and used a timing light to achieve this btw). Also is a 86 jet

> good to run with a polini paired with 15mm genuine bing/matching 15mm

> intake?

I told you to get the DMP kit and you don’t have to change much,

if you get the Polini kit you have to tune or do stuff beyond of your skills and since you don’t know what you’re doing nowadays and with the virus you can’t find anybody like me who never seized a bike out of almost 200 2t bikes Including full-size street bikes in my life!

So believe me or believe a College educated mod before me who knows nothing (my kids are older than him) and I mean nothing because every bike I built is still running while this mod who’s posting bullshit about non-porting and his puch bikes failed within a year and a half while mine are still been running since 2006 with my 200 pounds and many times my wife, my son and me were riding 10 miles back home,

(I mean wow, I’ve Built over a dozen polini kits in mid 2000s and non failed ever!

During that time so many seized on MA almost every time as soon as they would put one on their bike including the mod who’s posting the wrong information now,

It Sucks that mod is posting wrong info, but I’m used to it that’s why I never was a boss in every job I worked at because everybody that’s a boss knows nothing,

If you don’t don’t know what you’re doing you become a teacher,

Most every teacher boss or supervisor know nothin about nothing when it comes to the actual work,

I can’t wait to I’m banned Here so I don’t have to repeat the same thing I’ve been repeating for so many several years which is everybody but me posts bad info repeated over and over,

Re: Installing a better kit

Okay the DMP kit is the one I'll order. Thank you Roffman.

Re: Installing a better kit

whats the difference between dmp n k-star. i thought they were the same.

Re: Installing a better kit

Dirty30 Dillon /

I think the reason Ken was never a boss was because he spent too much time thinking inside his polini box.

Re: Installing a better kit

Here's what I'm going to do to the new kit. I watched a youtube vid on how to do this. Pics below

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51A7E621-A2B5-46A6-B7D6-A9B60B544873.png

Re: Installing a better kit

I don't understand. Widen the cylinder skirt doodley? Dude if ur gonna do that case matching isn't far away.

Re: Installing a better kit

id get new rings n go nuts on your old kit first.

Re: Installing a better kit

I'm doing it to the old kit. I have a new ring for it that I had laying around in a box. Plus I'm going to do a ring gap with sandpaper, feeler gauges, and patience.

Re: Installing a better kit

Man, Ken, that sounds kinda personal, I wasn't telling the guy he should slap it on, I always match them, but I know a couple bikes running around at rallies that aren't matched and run fine for years. It's the best way to do it but definitely not the only way. Statistically, you're gonna have more unmatched bikes seize just because the people building them are cutting corners everywhere else or beginners that screw it up.

I feel bad you get bummed about it, but you miss out on the larger half of this whole community, going to rallies and stuff; you see people blasting, you ride long distances, you party together. You'd probably love some of the long ride camping rallies we do, 200 miles in a weekend loaded down with all your camping gear.

I don't build the best bikes around here by a long shot but I've been going to rallies since 2006, building bikes that keep up and never, ever, loaded in the chase. Those of us that see each other each summer know whose blasting, who is broke down, and have a rapport. You're a valued member of the community around here but you lose respect when you think you have the only right way to do stuff or don't respect people that build or ride differently.

If my profession has taught me anything it's just how much I don't know. It's also taught me to be evidence based and objective. When you ride with other people in person you find out pretty quick what works and what doesn't. If we give you a hard time around here, part of it is because you're out there doing your thing, posting blurry cell phone video of a stock speedo telling people that ride hard miles in a group it's the only way to do stuff. That's cool and all but riding with dozens, hundreds of other bikes a year you see a lot of stuff that doesn't fit into a pretty box of what the manual says.

Either way we all hope you stick around, sounds like the o.p. made the right decision.

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