krexken
Zone Head
Posts: 732
|
posted August 31, 2007 08:06 PM
My Old 1361 Dropped a Valve
Back in 01 I put a 1361 kit in my 00 12 with 3k on the clock. Sold it to a friend nearly 4 years ago and he's only put around 1k on it and I had put 8k on the motor before I sold. Anyways, he brings it to me sounding bad. Definitely had a dead hole sound and rattling kinda like a really loose header flange. I popped the valve cover off and notice it's missing a bucket on the intake side. Few hours later the engine is out. The intake cam is one of Lee's spec regrinds. Not sure who ground it but the cam held up great. Checked valve lash as all were as originally shimmed. Double springs were also supplied by Lee. I'm guessing the valve probably floated and that spit the shim out and caused bucket to bust next time the cam came around. Valve is stuck in head. Haven't pulled head but suspect it's not good underneath. I should get time to pull it in a few days. I still have half a set of new Lees springs to compare pressures to the used ones. Curious how much pressure has changed. I've heard of busa retainers being aluminum and will work on Kaws. Anybody know for sure? Sure would be nice to loose some weight up there but I'd like to know how stout they are also.
  
|
VincentHill
Needs a life
Posts: 6520
|
posted September 01, 2007 04:22 AM
I used Aluminum Spring Retainers in my 1025 KZ1000 Road Racer because if weight. WHen I got more money I changed to TI Retainers and always felt a lot safer because I knew they would hold up better when things went bad! Look for TI
|
entropy
Moderator
Posts: 8671
|
posted September 01, 2007 07:38 AM
 Edited By: entropy on 2 Sep 2007 05:14
ken,
I have a set of Ti retainers; make me an offer 
sorry, Ken, the Ti retainers are gone. I had previously promised em to chavcat. and he still wants em.
____________
This moderator uses moderation in moderation
|
VincentHill
Needs a life
Posts: 6520
|
posted September 01, 2007 01:21 PM
quote:
ken,
I have a set of Ti retainers; make me an offer
Do you also happen to have some Extra Stainless Exhaust Valves for Sale?
|
entropy
Moderator
Posts: 8671
|
posted September 02, 2007 04:16 AM
quote:
Do you also happen to have some Extra Stainless Exhaust Valves for Sale?
Hell, Vincent, I'd give you any ss valves i had laying around!
Unfortunately i looked around this am and it seems i chunked all the old ones.
____________
This moderator uses moderation in moderation
|
VincentHill
Needs a life
Posts: 6520
|
posted September 02, 2007 06:52 AM
Had that many that the space would make a difference
Sending you a PM with my Address to get the Oil Squirters! I have FINALLY Stopped all of the outside projects after this weekend and hope to be ready for Maxton 10/21/07 my Birthday! (Provided the testing works out)
|
entropy
Moderator
Posts: 8671
|
posted September 03, 2007 07:13 AM
hey vince, i'll send a coupla squirters as soon as i get yr address.
I hate to say it but time is getting real short for any major work & testing to be done by mid oct, SO GET AFTER IT!!!!!! :d
____________
This moderator uses moderation in moderation
|
krexken
Zone Head
Posts: 732
|
posted September 09, 2007 09:49 PM
Finally got the head off tonight. Head will need replacing since the bucket bore was chewed up pretty badly. Piston is actually not too bad and definitely reuseable. Also discovered that all the pistons were hitting the head on the exhaust side. Pistons are .010 down in the hole and had a .025 head gasket. Never woulda thought that they'd hit but don't think there's any damage from it.
|
entropy
Moderator
Posts: 8671
|
posted September 10, 2007 12:11 AM
Edited By: entropy on 10 Sep 2007 01:13
ken,
bucket bores can be fixed.
OEM is 26.5mm and Busa buckets are 28mm.
I just went thru a bit of an exercise with bucket bores, but bottom line is they can surely be repaired.
If you go that route, make double damn sure that the guy who bores the bucket well knows what he is doing. The clearance is REAL tight.
BTW: where did you get a .025 HG????
BTW#2: how do the rod bearings look? I don't think they like it when piston is hitting the head.
____________
This moderator uses moderation in moderation
|
ninja12
Needs a job
Posts: 3310
|
posted September 10, 2007 06:27 AM
Ken,
I'd bet you lost a rod bearing BEFORE the piston hit the head.
.035 is plenty of room.
If the piston was hitting the head, no way would you get 8k miles out of it.
my first .02 is free without request . 
good luck on the repairs
|
krexken
Zone Head
Posts: 732
|
posted September 10, 2007 07:35 PM
All the pistons are hitting or touching. I'm suspecting it probably only does it when it's cold when pistons rock more than usual. All bearings seem tight just giving it the spin check. No slack, in other words. Haven't torn into the bottom end yet. The head gasket is one Muzzy supplied with the kit. The one I installed on a 1224 Muzzy zrx big bore kit the other day was .025 as well. Not a cometic.
I'm glad you mentioned the bucket bore, Karl. I'm hoping it can be fixed also. I'll ask around and see who can do it. Anybody you trust to do yours?
I'm also gonna see if one lobe on the reground cam can be repaired. I'm doubting it but it can't hurt to ask.
Thanks for the tips, fellers.
|
entropy
Moderator
Posts: 8671
|
posted September 11, 2007 12:38 AM
Ken,
I had all 16 of my bucket wells bored for busa buckets(28mm) by a guy in Ohio who over bored them WAY too much and the buckets rocked excessively (any rocking at all is excessive).
Andy at Metric MC in Houston rebored them to fit 28.5mm buckets from Kibblewhite and did a really, really nice job, but he isn't really set up to do it and it was a bitch. Not sure he'd want to do it again.
Dave Owen recently told me about someone he routinely uses in the NEast for bucket boring. If you want i'' call Dave and get that guy's name & number.
After 6 years is that head ready for any other work, or are you looking at just fixing the bucket bore??
Getting one lobe fixed shouldn't be a biggie.
As for the 1361 pistons hitting the head. Mine also did that in late 2001, and it was set up exactly as Muzzy sold the kit. Prob just need to add a .005 base gasket, Cometic has em in copper.
____________
This moderator uses moderation in moderation
|
entropy
Moderator
Posts: 8671
|
posted September 11, 2007 10:13 AM
Ken,
here you go for bucket well work.
Rick at Harrys machine 508-366-1455
Or you could call Andy at Metric, he may want to do some more bucket work, He does great seats, guides, all that stuff, has the right equip to do it right and he is fast.
____________
This moderator uses moderation in moderation
|
krexken
Zone Head
Posts: 732
|
posted September 11, 2007 12:39 PM
Thanks a bunch, Karl. I'll give them a try. It's gonna need a guide also. I'm guessing the busa buckets are close in thickness? What are you running for valvesprings? I've still got half a set I got from Lee years ago but I'm kinda chicken of using those again but I guess any valvespring will lose tension after x amount of cycles. The owner of the bike wants more power than before, naturally, but really doesn't want to spend any money to speak off. The usual deal. Other than maybe a pro port and big cam setup from Carpenter, I really don't know what else to do to this engine to make a difference. I think it's biggest bottleneck is the HMF exhaust with the 2" midpipe and can.
|
entropy
Moderator
Posts: 8671
|
posted September 11, 2007 02:50 PM
Edited By: entropy on 12 Sep 2007 03:25
the biggest difference IMO is a good multi angle valve seat job.
If you are gonna cut the seats, replace a guide, and fix just one bucket hole, i think Andy in Houston would do the job VERY, VERY nicely. do a search on Metric MC in Houston. The seats and guides and surfacing heads is what he is set up for, the bucket he can do very well, its just a lil bitch. Call Andy and see what he says.
The Busa bucket is 28mm, the OEM kwak is 26,5mm
I am running either Muzzy or Kibblewhite springs, can't remember which, but I shim them to 60-65#.
Ken,
Give me a call on my cell 832 603 3591. I have 2 heads i have been "playing" (and paying) with for the last year,
____________
This moderator uses moderation in moderation
|
|
|
HOME
NEW TOPIC