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2 Stroke Bicycle Engines & Kits 2 stroke engine kits need careful installation and setup, find out how from our professionals here!

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  #21  
Old 12-13-2016, 08:56 PM
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Default Re: Cannonballs Back Into It With A BT 80

Great reply Curt....lol
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  #22  
Old 12-13-2016, 09:56 PM
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Default Re: Cannonballs Back Into It With A BT 80

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Originally Posted by curtisfox View Post
How you going to knit a starter?..........................LOL.....Curt
3d knitting needles!

Yeah may go thru my weedeater junk box and see if a transplant is possible. Good idea Scratch!
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  #23  
Old 12-14-2016, 10:58 AM
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Default Re: Cannonballs Back Into It With A BT 80

So out of desperation to ride I re-engineered the recoil. Took the plastic starter pawl drilled, tapped and installed a small machine screw. Then ground the head square to engage the cranks cup properly. And it works! For a while I guess.

Got several rides in and this is a great little engine(so far). Starts easy(good thing!), idles very well and has a good fat power band. Clutch engages early and pulls easily from standing. I got my ratio for the 24" wheel just right.

I haven't wrung it out as its breaking in but I did briefly do a bit of high speed running and its very smooth. Almost vibe less. What little there is seems to be of a lower frequency than the vibes of a CG and not overly objectionable.

The exhaust seemed quite restrictive as a good bit of induction noise was evident. I removed the end cap of the muffler and shortened the exit tube even with the cap. That solved the problem and it is still very reasonable on sound.
Excepting the recoil issue(not a problem if going electric) I'm very pleased with the engine so far. Still early in the relationship though!
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  #24  
Old 12-14-2016, 12:22 PM
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cannonball2 cannonball2 is offline
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Default Re: Cannonballs Back Into It With A BT 80

Heres a few pics of the rough out. Not real pretty. Its basically just thrown together to get the engine running and evaluated.

You can see the threaded spring anchors nut on the recoil housing. Breaking in on 25:1. Manual called for 20:1--no way. Its barfing out all manner of black oil as it is. Surprised it runs as well as it does. I run marine fuel with no ethanol. Everything runs better on it.
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  #25  
Old 12-14-2016, 05:51 PM
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Default Re: Cannonballs Back Into It With A BT 80

That's nice, not a lot'a clutter. It's nice to be able to run drive chain straight back. Are you going to install an expansion chamber pipe?
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  #26  
Old 12-14-2016, 06:17 PM
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Default Re: Cannonballs Back Into It With A BT 80

Nah, no pipe. Will be leaving it as stock as possible.

This build is not very inspiring to me. The frame is better than I expected. The front end sucks big time. Hope to replace it with a MTB suspension fork I have.

Other than the front end the bike runs and rides well. What I hope to wind up with is a reliable, good running beater type bike. One I can use for running errands around the local area. Will paint it and make it presentable. But that's about it. I just want it to work.

I have the Villiers and the B&S builds to lavish some attention too. Need to get back on them.

Got a response from Bikeberry requesting pics and an explanation of what failed. That's reasonable. So far my "fix" is working fine. Has lasted longer than the original recoil.
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  #27  
Old 12-14-2016, 07:26 PM
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Default Re: Cannonballs Back Into It With A BT 80

I've meet a guy who went over the handlebars Twice! with his front end like yours. 200$ He was ready for a mt. bike fork also. His bike is like 1000$ or more. I suggested" how bout a 24" wheel, then it wouldn't bottom out. Hate to see him disappointed in a 200$ fork. That's what I thought looking at your bike, that it would be a nice, hop on and go. (especially with a push button start..he he) Lavish..on

Last edited by scratchbuilder; 12-14-2016 at 07:30 PM. Reason: mistype
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  #28  
Old 12-14-2016, 07:35 PM
curtisfox curtisfox is offline
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Default Re: Cannonballs Back Into It With A BT 80

Quote:
Originally Posted by cannonball2 View Post
Nah, no pipe. Will be leaving it as stock as possible.

This build is not very inspiring to me. The frame is better than I expected. The front end sucks big time. Hope to replace it with a MTB suspension fork I have.

Other than the front end the bike runs and rides well. What I hope to wind up with is a reliable, good running beater type bike. One I can use for running errands around the local area. Will paint it and make it presentable. But that's about it. I just want it to work.

I have the Villiers and the B&S builds to lavish some attention too. Need to get back on them.

Got a response from Bikeberry requesting pics and an explanation of what failed. That's reasonable. So far my "fix" is working fine. Has lasted longer than the original recoil.
What is the issue with the fork? always thought they were suppose to be good..........Curt
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  #29  
Old 12-15-2016, 08:04 AM
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cannonball2 cannonball2 is offline
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Default Re: Cannonballs Back Into It With A BT 80

Scratch the electric start is looking better right about now. I can use an old Snapper mower push start switch. Its HD enough to run the starter directly eliminating the solenoid and wiring. Coupled with a 4cell Lipo its simple and compact. Might do it. Takes all of 20min to reinstall the starter system.

Curt
There are many versions of the Monark springer. some good some not.
This one was made for this frame. It is a 1 1/8 threadless stem. The issue besides needing to be bushed on the rockers is that apparently the stem is turned slightly undersized. The spring mount which also sets the bearing preload/play will not tighten down on the stem. I have drilled the original small allen pinch bolt out and installed a Gr8 1/4 bolt. Its tightened to the point of breaking and the clamp is still loose. I am using a 1 1/8 lock collar to hold it all together temporarily. The thing is best thrown in the junk box for parts.

I bought the frame and the springer at different times when on sale. They were both(each) $99 with free shipping. Id be really bent if I paid more!

Frame is good. Its an earlier model with the closer spacing on the engine front mount. Easily slotted for later engines. I was amazed/pleased the tank didn't leak. Will slosh it anyway.
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  #30  
Old 12-15-2016, 08:26 AM
curtisfox curtisfox is offline
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Default Re: Cannonballs Back Into It With A BT 80

Ok thanks, good to know. Stay away from cheap junk, MotoMagz bought a realy nice one. Stainless bushed rocker. Come with a disk brake rocker also. Don't remember the co., could pm him.
Sure looking good, nice a simple like always................Curt
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