Planet Minis

slide1in · 05-09-2008, 12:01 PM

I Just Bough One And Was Wondering If I Will Get A Nice Boost In Power If I Use A 88cc Kit And The Stock Exhaust? Its Just So Quiet Would Like To Keep It That Way For Woods Night Riding.

Thumpin90 · 05-09-2008, 12:11 PM

yea you will feel a little bit of power but the stock exhaust is very restrictive. cut the baffle out, it will be louder but you will increase your performance better then a stock baffled exhaust.

stevec · 05-09-2008, 09:21 PM

Quote:

Originally Posted by slide1in

I Just Bough One And Was Wondering If I Will Get A Nice Boost In Power If I Use A 88cc Kit And The Stock Exhaust? Its Just So Quiet Would Like To Keep It That Way For Woods Night Riding.

Just wondering which 88 kit for your Z50A?

firepower354 · 05-09-2008, 10:02 PM

Honda Trail Bikes

stevec · 05-09-2008, 10:15 PM

^ Thank you.

vegatron75 · 05-09-2008, 10:24 PM

I run an Takegawa 88 kit w/ the stock 50 head on my Z50. I've also ran a Trail bikes 88 kit w/ the race head. Both kits have been run through the stock Z50 exhaust.
It's nice and quiet and both engines run well and make good power.

76fifty · 05-11-2008, 08:09 AM

Vegatron, Do you think the race head on the TB88 kit makes a big difference? Is it worth the extra $165?
My other question is what is the difference between the K0 to '78 engines and the 80's to 90's engines?
There's such a difference in price for the 88cc kits for the two.

Lair · 05-11-2008, 08:14 AM

The later model engine had a slightly different bore/stroke configuration, and also had CDI ignition and a roller bearing cam.

Slide - please don't hack up your stock exhaust. Quiet is the new loud.

Congrats on the purchase. I sold a '78 a couple of months ago.

firepower354 · 05-11-2008, 08:22 AM

Same B&S, rod went from 91mm to 94mm and changed the pin height.

Lair · 05-11-2008, 08:28 AM

Quote:

Originally Posted by firepower354

Same B&S, rod went from 91mm to 94mm and changed the pin height.

Thanks for the clarification. I thought the rod was different because of a bore/stroke change.

76fifty · 05-11-2008, 08:35 AM

So the pin on the newer motors is more towards the dome of the piston than the old one. Being pushed from the "business end" of the piston would probably make the top of the piston move less than pushing from the bottom. And I don't mean move less up and down but from one side of the cylinder to the other.
Thanks for the info.

vegatron75 · 05-11-2008, 09:46 AM

Quote:

Originally Posted by 76fifty

Vegatron, Do you think the race head on the TB88 kit makes a big difference? Is it worth the extra $165?
My other question is what is the difference between the K0 to '78 engines and the 80's to 90's engines?
There's such a difference in price for the 88cc kits for the two.

I really don't think the race head makes much difference. I've ran both motors in the same bike,same gearing, same carb. I'm sure the race head makes more power on the top end. But the stock head w/ the Takegawa cam runs pretty good too. I'd say it depends on what your doing. All I'm doing is riding wheelies w/ these motors. The three speed trans hurts when going too fast.
The major differences between old and new motors. As far as I know. Rod length is one and ignition. Points for the old and cdi for the newer. Older motors have a manual cam chain adjustment also.

76fifty · 05-11-2008, 01:15 PM

Like Slide1in i'm going to go with the 88cc kit with the stock exhaust.
On my '76 I can remove what looks to be a spark arrestor from the muffler.
It does make it noisier but maybe it will work o.k. with the 88.
And then again, for cruising around the yard maybe the increased noise will piss off the neighbors. This should make for a worthwhile experiment.

slide1in · 05-12-2008, 08:06 AM

Thanks for all the help, I may even check out that 75cc kit from kitaco. Have any of you fellas ever try the pivot works swingarm bearing kit for the honda 50's 73-current? Looks like a nice way to go thanks again.

patman · 05-12-2008, 05:39 PM

I did the TB RH 88 kit on my XR50 and ran the stock exhaust for a while.All I changed was I cut off the spark arrester.It worked really well and was quiet.I then switched to Fast Minis Speed exhaust and if you ask me it was a waste of money.Made it really loud and only gained a little bit of low end.The mid and top end were good with the stock stuff.

05-09-2008, 12:01 PM	#1 (permalink)
slide1in 2nd Gear Member Join Date: Sep 2007 Posts: 286	78 Z50a I Just Bough One And Was Wondering If I Will Get A Nice Boost In Power If I Use A 88cc Kit And The Stock Exhaust? Its Just So Quiet Would Like To Keep It That Way For Woods Night Riding.

05-09-2008, 12:11 PM	#2 (permalink)
Thumpin90 2nd Gear Member Join Date: Feb 2007 Location: Chicago Posts: 925	Re: 78 Z50a yea you will feel a little bit of power but the stock exhaust is very restrictive. cut the baffle out, it will be louder but you will increase your performance better then a stock baffled exhaust.

05-09-2008, 10:02 PM	#4 (permalink)
firepower354 Advertiser Join Date: Oct 2006 Location: Flint MI Posts: 11,002 My Mood:	Re: 78 Z50a Honda Trail Bikes __________________ If it has my name on it I did it;) FirepowerMinis.com Custom FPM parts and engines. Parts and service for all makes. Honda Trail Bikes parts and accessories. Pitster/Piranha/Thumpstar bikes, parts, engines and accessories.

05-09-2008, 10:15 PM	#5 (permalink)
stevec 2nd Gear Member Join Date: Sep 2007 Posts: 422 My Mood:	Re: 78 Z50a ^ Thank you.

05-09-2008, 10:24 PM	#6 (permalink)
vegatron75 2nd Gear Member Join Date: Jul 2006 Location: South of Kansas City Posts: 637	Re: 78 Z50a I run an Takegawa 88 kit w/ the stock 50 head on my Z50. I've also ran a Trail bikes 88 kit w/ the race head. Both kits have been run through the stock Z50 exhaust. It's nice and quiet and both engines run well and make good power.

05-11-2008, 08:09 AM	#7 (permalink)
76fifty PM Newbie Join Date: Apr 2008 Location: Edgewood, WA 98372 Posts: 9	Re: 78 Z50a Vegatron, Do you think the race head on the TB88 kit makes a big difference? Is it worth the extra $165? My other question is what is the difference between the K0 to '78 engines and the 80's to 90's engines? There's such a difference in price for the 88cc kits for the two.

05-11-2008, 08:14 AM	#8 (permalink)
Lair 2nd Gear Member Join Date: Nov 2007 Location: Birmingham, AL (Not a native.) Posts: 401	Re: 78 Z50a The later model engine had a slightly different bore/stroke configuration, and also had CDI ignition and a roller bearing cam. Slide - please don't hack up your stock exhaust. Quiet is the new loud. Congrats on the purchase. I sold a '78 a couple of months ago.

05-11-2008, 08:22 AM	#9 (permalink)
firepower354 Advertiser Join Date: Oct 2006 Location: Flint MI Posts: 11,002 My Mood:	Re: 78 Z50a Same B&S, rod went from 91mm to 94mm and changed the pin height. __________________ If it has my name on it I did it;) FirepowerMinis.com Custom FPM parts and engines. Parts and service for all makes. Honda Trail Bikes parts and accessories. Pitster/Piranha/Thumpstar bikes, parts, engines and accessories.

05-11-2008, 08:35 AM	#11 (permalink)
76fifty PM Newbie Join Date: Apr 2008 Location: Edgewood, WA 98372 Posts: 9	Re: 78 Z50a So the pin on the newer motors is more towards the dome of the piston than the old one. Being pushed from the "business end" of the piston would probably make the top of the piston move less than pushing from the bottom. And I don't mean move less up and down but from one side of the cylinder to the other. Thanks for the info.

05-11-2008, 01:15 PM	#13 (permalink)
76fifty PM Newbie Join Date: Apr 2008 Location: Edgewood, WA 98372 Posts: 9	Re: 78 Z50a Like Slide1in i'm going to go with the 88cc kit with the stock exhaust. On my '76 I can remove what looks to be a spark arrestor from the muffler. It does make it noisier but maybe it will work o.k. with the 88. And then again, for cruising around the yard maybe the increased noise will piss off the neighbors. This should make for a worthwhile experiment.

05-12-2008, 08:06 AM	#14 (permalink)
slide1in 2nd Gear Member Join Date: Sep 2007 Posts: 286	Re: 78 Z50a Thanks for all the help, I may even check out that 75cc kit from kitaco. Have any of you fellas ever try the pivot works swingarm bearing kit for the honda 50's 73-current? Looks like a nice way to go thanks again.

05-12-2008, 05:39 PM	#15 (permalink)
patman 3rd Gear Member Join Date: Aug 2006 Location: Minnesota Posts: 2,211	Re: 78 Z50a I did the TB RH 88 kit on my XR50 and ran the stock exhaust for a while.All I changed was I cut off the spark arrester.It worked really well and was quiet.I then switched to Fast Minis Speed exhaust and if you ask me it was a waste of money.Made it really loud and only gained a little bit of low end.The mid and top end were good with the stock stuff.

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