CT90 Restoration Adventures

Hi, sorry for the delayed response. I don't h...

2021-05-19T22:43:45.771-07:00

Hi, sorry for the delayed response. I don't have a specific recommendation and suggest that you do a search on the web and you'll find recommendations on specific methods you can follow to break in your new engine. For myself, I don't tend to follow a specific regimen when breaking in a new engine, but I do try and vary the load on the engine and avoid long sustained periods of running at a specific speed. After a few weeks I'll change the oil and call it good. This approach has served me well and while I'm sure there are people would love to debate what the best approach is, my general recommendation is to ride your bike, don't get crazy, and after a while change the oil and you should be fine as these are very forgiving engines.

Hi, I've updated this post with links to where...

2021-05-19T20:44:11.208-07:00

Hi, I've updated this post with links to where you can download the .stl files for either of the two boots if you would like to try and print one of these boots. If you do end up printing one I would be interested in hearing how it turned out and if it worked on your CT90.

I have an st90 which is a similar engine to the ct...

2021-05-15T19:04:47.328-07:00

I have an st90 which is a similar engine to the ct90. My shift drum stopper popped out and the bolt is tight. Any ideas?

It seems like it would matter depending on where t...

2021-05-15T12:41:42.281-07:00

It seems like it would matter depending on where the check valve is located. If the check valve were screwed into the spark plug hole, then hose volume might not matter. But if the check valve is between the hose and the gauge, then it seems like the pressure in the hose would bleed off between each compression stroke, so then it would matter a great deal.

Hello do you sell the parts that you have printed ...

2021-05-09T09:19:07.190-07:00

Hello do you sell the parts that you have printed

Big thank you for sharing this! It's highly co...

2021-05-04T09:42:52.955-07:00

Big thank you for sharing this! It's highly commendable detail and methodical job you did, Michael!

Did you ever try the MEK method and did it work fo...

2021-04-27T17:39:33.807-07:00

Did you ever try the MEK method and did it work for you? I am getting ready to try it on a broken downtube for my '72 restoration and was wondering how others found it.

thanks

L

2021-04-20T16:03:56.694-07:00

You are the man. Always love going through your bl...

2021-04-18T03:00:01.609-07:00

You are the man. Always love going through your blogs when I am curious or stumped about something. Bought your clutch tool a while back and it was very essential while I did my rebuild. Thank you for all you do and share.

That is fantastically. Although I don't have...

2021-04-07T05:24:48.193-07:00

That is fantastically. Although I don't have 3d print or ct90 (have s90 and cl90), I appreciate your love for the ct90 and generosity for sharing the print files.

Thanks for sharing your useful information, Mechan...

2021-03-31T23:53:39.893-07:00

Thanks for sharing your useful information, Mechanic Oakleigh|RWC Melbourne.

few helpful links are here https://bestmultimeter2...

2021-03-31T02:07:10.419-07:00

few helpful links are here
https://bestmultimeter2020.com/how-to-use-best-multimeter-pros-tip/

https://bestmultimeter2020.com/best-multimeter-under-100/

Turn signal housing is still wired up to bars, so ...

2021-03-14T14:55:43.812-07:00

Turn signal housing is still wired up to bars, so will be more difficult. Are there any specific tweezers that can be used to compress the spring and the sliding U shaped contact that will mate with the contact feature of the wire harness and also then assemble the spring and detent ball into the other side of the black slider component and then while keeping the ball detent and sliding contact compressed

This is a great reference!

2021-03-11T20:21:06.676-08:00

This is a great reference!

I love this. As much as I love my original carb, I...

2021-03-11T10:56:49.225-08:00

I love this. As much as I love my original carb, I've never been able to tune it just right. I'm going to try 1 more time before I give up. I've used the aftermarket ones that are slightly different because of the drain. Do you have a recommendation on making the plug? I don't have a lathe or anything that could help me make a perfect plug like you did.

I admire your ingenuity, Michael! Is it worth-ed t...

2021-02-20T13:50:20.962-08:00

I admire your ingenuity, Michael! Is it worth-ed to have it patented? Good luck!

This is great, you'd be doing a great service ...

2021-02-13T12:18:33.529-08:00

This is great, you'd be doing a great service to CT90 owners if you put the schematics for the airbox pieces.

As always, very useful info, Michael! Thanks a lot...

2021-02-13T07:54:52.987-08:00

As always, very useful info, Michael! Thanks a lot!

Thanks for taking the time to do this. Very intere...

2021-02-02T14:21:20.553-08:00

Thanks for taking the time to do this. Very interesting.

Hello, I hope that you are doing good. I have this...

2021-02-02T06:41:01.221-08:00

Hello, I hope that you are doing good. I have this newer honda bike with almost the same parts as yours and I have this thing that I hope you can enlighten me through your years of experience on how the gearshift arm is hitting the case. I uploaded a video in youtube so that people can help me understand why this is happening. Thank you sir. https://www.youtube.com/watch?v=-wuiexUeOcE

Thanks so much for this step by step information! ...

2021-01-24T19:46:57.624-08:00

Thanks so much for this step by step information! What do you recommend for the engine brake in period? My son is almost done with his rebuild and did the same Dr. ATV big bore (53.5mm) piston.

Thanks so much for working on a boot for the K1! ...

2021-01-18T22:02:12.891-08:00

Thanks so much for working on a boot for the K1! I need to replace mine, so would be very interested. If you need to check the fit on a running K1... I would be happy to try it out!

Great write up and clear photos! Thanks again Mich...

2021-01-03T17:51:26.086-08:00

Great write up and clear photos! Thanks again Michael!

Please support the author by purchasing his clutch...

2020-12-30T23:12:16.903-08:00

Please support the author by purchasing his clutch holding tool combo he invented. As of December 2020, there are no less than 6 copycats selling off Ebay, all from China. I already bought one from him, gladly paid even at higher price, but it's desined by American and made in USA! I've learned a lot from this blog, thanks so much!

So far the best. I have my recall after 40 yrs lef...

2020-12-29T01:02:13.898-08:00

So far the best. I have my recall after 40 yrs left h s90z in the barn.
Tqvm
One small q, The magneto have 4 marks,

1= T
2 = F
3 = the two marks about one inch before F, pls if you, the meaning of these two marks

Tqvm