Author Topic: Timing chain help  (Read 2294 times)

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Offline Jmed22

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Timing chain help
« on: June 14, 2017, 10:25:49 AM »
Wanted to upload a video of my problem but would not let me as tgere seems to be no option for it. I need some help with my timing I believe I have too much slack in my timing chain because I can rotate my crank back and forth quite a bit ( maybe 1/4 inch) before my cam turns which is causing me grief and getting it to time right I am not sure how I can adjust the timing chain with the tensioner or if that is too much play please any help would be greatly appreciated and I have been struggling to get the old girl back on the road

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Offline Jmed22

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Re: Timing chain help
« Reply #1 on: June 15, 2017, 08:47:22 AM »
Was also doing some researching and had found that there may be a as many as three different style gasket for my engine? Only reason I am bringing this up is due to the fact I am going to need to pull off the side cover and obviously we'll need a new gasket set but am worried about ordering the correct one as this has recently come to my attention.. any help on this issue I am having would be great and would greatly appreciate

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Offline flybox1

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Re: Timing chain help
« Reply #2 on: June 15, 2017, 08:56:11 AM »
What bike is this for?

If not a SOHC4, it needs to be moved to the Other Bikes page.  You'll probably get more answers if you include the pertinents....
Year, model...etc.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
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"Knowledge without mileage equals bullsh!t" - Henry Rollins

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Offline Jmed22

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Re: Timing chain help
« Reply #3 on: June 15, 2017, 08:57:31 AM »
Its a 67 Honda cl90 and its a sohc bike.

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Offline flybox1

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Re: Timing chain help
« Reply #4 on: June 15, 2017, 09:02:02 AM »
Its a 67 Honda cl90 and its a sohc bike.

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order an OEM HONDA gasket. 
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline lrutt

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Re: Timing chain help
« Reply #5 on: June 15, 2017, 09:04:47 AM »
There is a cam chain tensioner on those little bikes. Do you have a shop manual? if so, check it out. I believe it comes up from the bottom.

How many miles. Popping the top on one of those motors and changing the chain is pretty easy and cheap. I've rebuilt so many of those could almost do it in my sleep.
06 Harley Sporster 1200C, 06 Triumph Scrambler, 01 Ducati Chromo 900, 01 Honda XR650L, 94 Harley Heritage, 88 Honda Hawk GT, 84 Yamaha Virago 1000, 78 Honda 750K w/sidecar, 77 Moto Guzzi Lemans 850, 76 Honda CB750K, 73 Norton 850, 73 Honda Z50, 70 & 65 Honda Trail 90, 70 & 71 Triumph 650s, 65 Honda 305 Dream, 81 Honda 70 Passport, 70 Suzuki T250II, 71 Yamaha 360 RT1B, 77 BMW R75/7, 75 Honda CB550K, 70 Honda CT70

Offline Jmed22

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Re: Timing chain help
« Reply #6 on: June 15, 2017, 09:06:59 AM »
No I do not have a shop manual on it I have been doing some research and was told that some models were non adjustable and some were. I am pulling the motor out right now so I can put it on my bench to make it a little easier to work on

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Offline Jmed22

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Re: Timing chain help
« Reply #7 on: June 15, 2017, 09:08:17 AM »
Definitely believe there is too much slack in the timing chain as I can move my crank back and forth a good quarter of an inch before my cam starts to move which makes it near impossible to time it

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Offline Scott S

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Re: Timing chain help
« Reply #8 on: June 15, 2017, 10:30:48 AM »
Its a 67 Honda cl90 and its a sohc bike.

 Yes, but it's not a SOHC FOUR.
 BTW, cool bike and I have a CL70 and CL90 in the line up. But this does belong in the OTHER forum.
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Re: Timing chain help
« Reply #9 on: June 15, 2017, 11:16:32 AM »
Join the Yahoo group for the S90.  They have a scan of the gasket sets in the files sectionyou can id the correct gasket set from that scan.  It appears your CL is a late build with the ruby red metallic candy paint.  Mine has that color too.  Shoot me a few photos of the complete bike, interested in seeing them. 
David
David- back in the desert SW!

Offline Jmed22

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Re: Timing chain help
« Reply #10 on: June 15, 2017, 11:55:21 AM »
I definitely will thanks I will post some pictures when I am done just pulled the motor out today have to change the timing chain do other few things need to get done hopefully be running here within the week or so

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Offline strynboen

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Re: Timing chain help
« Reply #11 on: June 15, 2017, 01:20:28 PM »
the tession use to be a small schrev vith a Lock bolt..unscrev the Lock bolt and Loose a bit..then a spring vil press the adjuster aut..and it vill adjust itself..then redo the schrev light inn,,and turn tye Lock bolt..to sekure it..its the vay to do the smaller engines..but the 90 is sleightly different..

think the engine use hydralik..oil pressure to teighten the thain too..so there vill be a lot of slack at no pressure..try to pressure ot up..and thek the thain..just push the bike and feel vith a finger..if it teighten up..
« Last Edit: June 16, 2017, 08:01:08 AM by strynboen »
i kan not speak english/but trying!!
http://forums.sohc4.net/index.php?topic=60973.0
http://forums.sohc4.net/index.php?topic=144758.0
i hate all this v-w.... vords

Offline NobleHops

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Re: Timing chain help
« Reply #12 on: June 15, 2017, 10:11:45 PM »
This is a good site for those bikes;

https://lilhonda.com/webboard/
Nils Menten * Tucson, Arizona, USA

I have a motorcycle problem.

My build thread: NobleHops makes a 400F pretty for his wife: http://forums.sohc4.net/index.php?topic=131210.0

Offline Jmed22

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Re: Timing chain help
« Reply #13 on: June 19, 2017, 10:19:35 PM »
Thanks noblehops for advice joined and you were right. Awesome much appreciated

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Offline Jmed22

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Re: Timing chain help
« Reply #14 on: June 19, 2017, 10:20:24 PM »
And thanks strynboen for all the great info

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Offline NobleHops

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Re: Timing chain help
« Reply #15 on: June 20, 2017, 06:57:22 AM »
Thanks noblehops for advice joined and you were right. Awesome much appreciated

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 :D
Nils Menten * Tucson, Arizona, USA

I have a motorcycle problem.

My build thread: NobleHops makes a 400F pretty for his wife: http://forums.sohc4.net/index.php?topic=131210.0